| Author | Title | Publisher | Year | Pages |
| | O Sei San: a friend of Jose Rizal . | | | 1 |
| | O Sei San: Japanese young lady friend of Jose Rizal . | | | 1 |
| | O'Er Oceans And Continents . | | | |
| | Objectives, Curriculum, And Methods A Reexamination Seventh Teaching Institute . | | | |
| | Obligaciones hipotecarias del Tesoro de Filipinas. Disposiciones refentes a su creacion y a la negociacion de las de la Serie B e instrucciones relativas a la suscripcion, adjudicacion y entrega de las carpetas provisionales y regularizando el servicio de . | Tip.-Lit. de Chofre y Comp | 1897 | 140 |
| | Obligaciones y formularios que se han de observar por el personal de empleados en los presidios de estas Islas . | Imp.Militar | 1867 | 44 |
| | ObligacionesyformulariosquesehandeobservarporelpersonaldeempleadosenlospresidiosdeestaIslas . | Imp.deRamirezyGiraudier | 1871 | 47 |
| Ambrosio Santos | Obligations and Contracts . | J R Morales Press and Bookstore | 1924 | 633 |
| | Obra de la Propagacion de la Fe en favor de las Misiones Catolicas . | Candido Lopez | 1840 | 26 |
| Mussolini | La Obra Nacional Dopolavoro (post trabajo) en Italia Segunda edicion . | Societa editrice di Novissima | 1926 | 230 |
| | Obras Completas De Concha Espina . | | | |
| | Obras Completas de D. Jose M. De Pereda Tomo 1 . | Est. Tip. de los hijos de tello | 1917 | 363 |
| Mas, Sinibaldo de | Obras literarias . | M. Rivadeneyra | 1852 | 566 |
| Jose Rizal | Obras Literarias Libro Primero Poesias . | Comision National del Centenario de Jose Rizal | 1961 | 183 |
| Jose Rizal | Obras Literarias Libro Segundo Prosa: Vol. 111 . | Comision National del Centenario de Jose Rizal | 1961 | 346 |
| Hidalgo, J.G. | Obras Macalogogicas . | Imp.de Don Luis Aguado | 1890 | 615 |
| | Obras Malacologicas.Miembro de la Real Academia de Ciencias de Madrid y de otras Academias y Socledades extranjeras. Parte I . | Imp.de Don Luis Aguado | 1891 | 154 |
| | Obras Poeticas De Jose De Espronceda . | | | |
| | Obsequio A Los Suscritores De La Estrella De Antipolo . | | | |
| | Observaciones Del Presidente Sobre El Mismo Asunto . | | | |
| Imp. y Lit. de M. Perez | Observaciones gramaticales sobre la lengua Tiruray . | | 1892 | 58 |
| Laurel, Jose P. | Observations on the Proposed Constitutional Amendments . | Libreria de Sanchez | 1865 | 75 |
| Laurel, Jose P. | Observations on the Proposed Constitutional Amendments . | | 1940 | 73 |
| | An Observer in the Philippines . | Devins, John Bancroft | 1905 | 484 |
| | La obstruccion e impedimentos que por inevitable consequencia de la guerra . | | 1798 | 10 |
| | OCA-NBI 1962-1963 . | Office of the press secretary | 1962-1963 | 375 |
| C.R. Boxer | Occasional Papers No. 2 Catalogue of Philippine Manuscripts in the lilly Library . | | 1968 | 68 |
| | Occasional Songs for Primary and Intermediate Children . | | September 1940 | 156 |
| Malcolm, George A. | Occassional Addresses and Articles. Vol I . | | | 867 |
| Malcolm, George A. | Occassional Addresses and Articles. Vol. 3 . | | | 294 |
| Francisco M. Sacay | Occupations in the Field of Agriculture . | | 1937 | 13 |
| Brewer, John M.& Landy, Edward | Occupations Today . | | 1949 | 456 |
| Armando J. Malay | Occupied Philippines . | | 1985 | 276 |
| Armando J. Malay | Occupied Philippines the role of Jorge B. Vargas during the Japanese Occupation . | Filipiniana Book Guild | 1967 | 274 |
| W.H.Thomes | Ocean-LifeSeries.LifeintheEastIndies . | LeeandShepard,PublishersLee,ShepardandDillingham | | 360 |
| | Oceania: a journal devoted to the study of the native peoples of Australia, New Guinea and the Islands of the Pacific Ocean . | | | 175 |
| | Octaba Legislatura Filipina Primer Periodo de Sesiones [No. 3431] . | Philippine Islands. Laws, Statutes, Etc. | | 837 |
| | Octaba Legislatura Filipina, Segunda Periodo de Sesiones (No. 3529) . | | | 1048 |
| | Octava Legislatura Filipina Tercer Periodo de Sesiones (No. 3675), Lew que da el nombre de Romero Salas a la calle Divisoria, Ermita, de la Ciudad de Manila . | | | 961 |
| | Octavario ni San Juan Bautista . | Imp. Del Colegio de Sto. Tomas | 1873 | 79 |
| Plato | The Odyssey . | Penguin Books | 1946 | 359 |
| | The Odyssey . | Benguin Books | 1946 | 361 |
| | The Odyssey of a Digger . | | | |
| Mitchell, Mairin | The Odyssey of Acurio(Who Sailed With Magellan) . | | 1956 | 338 |
| | Odyssey of The Islands . | | | |
| | The Odyssey of The Philippine Commission . | | | |
| de la Costa, Horacio | Of men and Butiki . | | | 40 |
| | Of Men And Women . | | | |
| | The Offficial Journal of the Japanese Military Administration . | Manila Nichi Nichi Shimbun Sha, Inc. | | 130 |
| | Office of The Collector of Customs For The Philippine Archipelago . | | | |
| | Office of the Collector of Customs for the Philippine Archipelago (Customs Administrative Circular No. 141) . | | | 10 |
| | Office of the Collector of Customs for the Philippine Islands Aug. 10 1904 . | | 1940 | 12 |
| | Office of The Governor General of The Philippine Islands Manila . | | | |
| | Office of The Governor-General of The Philippine Islands . | | | |
| | Office of The President of The Philippines Manila . | | | |
| Thomas H. Barry | Office of the U.S Military Govnernor in the Philippine Islands . | Manila | 1898 | 64 |
| | Office of The U.S. Military Governor of The Philippine Islands – Special Orders No. 1 – 19 – Jan. - Dec. . | | | |
| | Office of the US Military Governor in the Philippine Islands Circular No. 2 1900-1901 . | | | 116 |
| | Office of the US Military Governor in the Philippine Islands General Order No. 131 . | | 1900 | 88 |
| | Office of the US Military Govnernor in the Philippine Islands General Orders No. 1-93 Jan.-June 1900 . | | 1900 | 243 |
| | Office of the US Military Govnernor in the Philippine Islands General Orders No. 94-133 July.-Oct. 1900 . | | 1900 | 44 |
| | Office of the US Military Govnernor in the Philippine Islands Special Orders No. 1-27 Jan.- Dec. 1900 . | | 1900 | 33 |
| | Officers of the International Associations of Historians of Asia (IAHA) . | | | 389 |
| | Officia Sactorvm Patonorvm . | Regia Seminarii Archepisc | 1770 | 190 |
| | Officia sanctorum patronorum ven. Congrgat and Collegi Sacroe familae . | | | 3 |
| | Official Catalogue Philippine Exhibits Universal Exposition St. Louis US A . | The Official Catalogue Company (inc.) | 1904 | 276 |
| | Official Catalogue Philippine Exhibits Universal Exposition st. louis US A. . | The Official Catalogue Company (inc.) | 1904 | 278 |
| | Official Congressional Directory . | | 1929 | 693 |
| | Official Congressional Directory for the use of the United States Congress Second Edition . | Government Printing Office | 1940 | 808 |
| | Official Congressional Directory Second Edition . | Government Printing Office | 1932 | 715 |
| | Official Constabulary Register for 1930 Headquarters Philippine Constabulary Manila Jan. 2, 1930 . | Bureau of Printing | 1930 | 194 |
| | Official Constabulary Registered . | Manila Bureau of Printing | 1929 | 168 |
| | Official directory 1960-1961 . | Bureau of Printing | 1960 | 214 |
| | Official directory 1960-1961 . | Bureau of Printing, | 1960 | 214 |
| | Official directory 1966-1967 . | Bureau of Printing | 1966 | 242 |
| | Official directory 1966-1967 . | Bureau of Printing, | 1966 | 242 |
| | Official Directory First Philipine Legislature . | | | |
| | Official Directory of the House of Representatives . | Bureau of Printing | 1950 | 220 |
| | Official Directory of the Republic of the Philippines . | Bureau of Printing | 1965 | 261 |
| | Official Directory of the Republic of the Philippines . | | | 125 |
| | Official Directory of the Republic of the Philippines: revised edition . | Public Relations Office, | 1947 | 134 |
| | Official Directory of the Republic of the Philippines: revised edition . | Public Relations Office, | 1949 | 205 |
| | Official Directory of the Republic of the Philippines: revised edition . | Public Relations Office, | 1950 | 153 |
| | Official Directory of the Senate . | Manila Bureau of Printing | 1955 | 109 |
| | Official File of the Commonwealth of the Philippines . | | | 688 |
| | Official File of the Commonwealth of the Philippines . | | | 323 |
| | Official File of the Commonwealth of the Philippines . | | | 463 |
| | Official file of the Philippine Commission Acts Nos. 1681 to 1800. Vol. X . | | 1905 | 413 |
| | Official file of the Philippine Commission Vol. VII Acts 1072-1383, Inclusive . | Bureau of Printing | 1905 | 776 |
| | Official file of the Philippine Commission Vol. VII Acts 1384-1336, Inclusive . | | 1905 | 728 |
| | Official File of The Philippine Commission. Acts 450 – 609, Inclusive. Vol. 4 . | | | |
| | Official File of the Philippine Legislature . | | | 452 |
| | Official File of the Philippine Legislature . | | | 295 |
| | Official File of The United States Philippine Commission . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette . | | | |
| | Official Gazette Republic of the Philippines edited at the office of the president under Commonwealth Act No. 638 entered as a second-class matter, Manila Post Office December 26, 1905 Vol. 93 No. 9 Manila Philippines March 3, 1997 . | National Printing Office | 1997 | 830 |
| | Official Gazette Republic of the Philippines edited at the Office of the President, under Commonwealth Act no. 638 entered as a second-class matter, Manila Post Office, December 26, 1905 Vol. 68 No. 28 Manila Philippines July 10, 1972 . | National Printing Office | 1972 | 702 |
| | Official Gazette Republic of the Philippines edited at the Office of the President, under Commonwealth Act No. 638 entered as second-class matter Manila Post Office, December 26, 1905 Vol. 98 No. 30 Manila Philippines, July 29, 2002 . | National Printing Office | 2002 | 160 |
| | Official Gazette Republic of the Philippines Vol. 93 August 4, 1997 No. 31 . | | 1997 | 650 |
| | Official Gazette Republic of the Philippines Vol. 93 October 6, 1997 No. 40 . | | 1997 | 124 |
| | Official Gazette Republic of the Philippines Vol. 93 September 1, 1997 No. 35 . | | 1997 | 961 |
| | Official Gazette Vol 78, No. 14 April 05, 1982 . | | | 576 |
| | Official Gazette Vol 78, No. 18 May 03, 1982 . | | | 609 |
| | Official Gazette Vol. 61 No. 27 July 5, 1965 . | National Printing Office | 1965 | 679 |
| | Official Gazette Vol. 61 No. 31 August 2, 1965 . | National Printing Office | 1965 | 858 |
| | Official Gazette Vol. 66 No. 18 May 4, 1970 . | | | 271 |
| | Official Gazette Vol. 71 No. 05 February 03, 1975 . | | | 709 |
| | Official Gazette Vol. 71 No. 09 March 03, 1975 . | | | 732 |
| | Official Gazette Vol. 71 No. 14 Abril 07, 1975 . | | | 569 |
| | Official Gazette Vol. 71 No. 48 December 1, 1975 . | | 1975 | 1154 |
| | Official Gazette Vol. 76, No. 22 . | National Printing Office | 1921 | 213 |
| | Official Gazette Vol. 81 No. 48 December 2, 1985 . | | 1985 | 618 |
| | Official Gazette Vol. 82 No. 1 January 6, 1985 . | | 1985 | 772 |
| | Official Gazette Vol. 82 No. 5 February 3, 1985 . | | 1985 | 510 |
| | Official Gazette Vol. 82, No. 29 . | | | |
| | Official Gazette Vol. 82, Nos. 31-32, 34 . | | | |
| | Official Gazette Vol. 84 No. 43 October 24, 1988 . | | 1988 | 165 |
| | Official Gazette Vol. 86 No. 49 December 3, 1990 . | | 1990 | 878 |
| | Official Gazette Vol. 87 Manila, Philippines, Jun 3, 1991 No. 22 . | | | |
| | Official Gazette Vol. 87 Manila, Philippines, Mar 4, 1991 No. 9 . | | | |
| | Official Gazette Vol. 87 Manila, Philippines, May 6, 1991 No. 18 . | | | |
| | Official Gazette Vol. 87 No. 1 January 7, 1991 . | | 1991 | 367 |
| | Official Gazette Vol. 87 No. 13 April 1, 1991 . | | 1991 | 563 |
| | Official Gazette Vol. 87 No. 5 February 4, 1991 . | | 1991 | 425 |
| | Official Gazette Vol. 93 No. 44 November 3, 1997 . | | 1997 | 777 |
| | Official Gazette Vol. 94 No. 9 March 2, 1998 . | | 1998 | 344 |
| | Official Gazette, April 1946 . | | 1946 | 1868 |
| | Official Gazette, December 1981 . | | 1981 | 489 |
| | Official Gazette, December 1994 . | | 1994 | 399 |
| | Official Gazette, February 1994 . | | 1994 | 477 |
| | Official Gazette, January 1946 . | | 1946 | 897 |
| | Official Gazette, March 1995 . | | 1995 | 585 |
| | Official Gazette, October 1997 . | | 1997 | 126 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 32 No. 25 Feb 27 1934 . | | | 605 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 32 No. 52 May 1 1934 . | | | 963 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 33 No. 120 Oct 5 1935 . | | | 691 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 42 No. 11A Nov 1946 . | | | 221 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 58 No.06 . | | | 1785 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 58 No.10 . | | | 612 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 61 No. 40 Oct 4 1965 . | | 1965 | 642 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 62 No. 40 . | | 1966 | 1176 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 62 No. 45 . | | 1966 | 904 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 69 No. 10 . | | 1973 | 1170 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 69 No. 6 . | | 1973 | 208 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 70 No. 44 Nov 4 1974 . | | | 678 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 70 No. 8 Dec 2 1974 . | | | 1048 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 71 No. 1 Jan 6 1975 . | | | 604 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 72 No. 14 Apr 5 1976 . | | | 1045 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 72 No. 9 Mar 1 1976 . | | | 1471 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 76 No. 48 Dec 1 1980 . | | | 902 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 77 No. 1 Jan 5 1981 . | | | 632 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 77 No. 48 Dec 7 1981 . | | 1981 | 489 |
| No. 22 June 3, 1985 | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 81 . | | 1985 | 420 |
| No. 26 July 1, 1985 | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 81 . | | 1985 | 277 |
| No. 29 July 2, 1985 | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 81 . | | 1985 | 208 |
| No. 31 August 5, 1985 | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 81 . | | 1985 | 79 |
| No. 35 September 2, 1985 | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 81 . | | 1985 | 646 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 81 No. 40 Oct 7 1985 . | | 1985 | 695 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 82 Jan 5 1910 . | | 1910 | 1022 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 83 No. 18 . | | 1987 | 264 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 83 No. 19 . | | 1987 | 348 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 83 No. 22 . | | 1987 | 528 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 83 No. 27 . | | 1987 | 238 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 83 No. 30 . | | 1987 | 134 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 83 No. 31 . | | 1987 | 382 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 93 No. 14 Apr 7 1997 . | | 1997 | 658 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 93 No. 18 May 5 1997 . | | 1997 | 599 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 93 No. 22 May 2 1997 . | | 1997 | 703 |
| | Official Gazette, Republic of the Philippines (Gaceta Oficial) Vol. 93 No. 27 Jul 7 1997 . | | 1997 | 240 |
| | Official Gazette, September 1994 . | | 1994 | 712 |
| | Official Gazette, Vol. 73, Nos. 10-13, March 7-28, 1977 . | | 1977 | 900 |
| | Official Gazette, Vol. 73, Nos. 14-17, April 4-25, 1977 . | | 1977 | 987 |
| | Official Gazette, Volume 1, January, 1942, Number 1 . | | 1942 | 27 |
| | The Official Journal of the Japanese Military Administration Vol. 1 . | Manila Nichi Nichi Shimbun, Inc. | | 298 |
| | The Official Journal of the Japanese Military Administration Vol. 10 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 191 |
| | The Official Journal of the Japanese Military Administration Vol. 11 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 173 |
| | The Official Journal of the Japanese Military Administration Vol. 12 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 189 |
| | The Official Journal of the Japanese Military Administration Vol. 3 . | Manila Nichi Nichi Shimbun, Inc. | | 319 |
| | The Official Journal of the Japanese Military Administration Vol. 4 . | Manila Niti niti Shimbun sha, Inc. | | 130 |
| | The Official Journal of the Japanese Military Administration Vol. 5 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 312 |
| | The Official Journal of the Japanese Military Administration Vol. 6 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 263 |
| | The Official Journal of the Japanese Military Administration Vol. 7 . | Manila Shimbun Sya | | 747 |
| | The Official Journal of the Japanese Military Administration Vol. 7 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 163 |
| | The Official Journal of the Japanese Military Administration Vol. 8 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 97 |
| | The Official Journal of the Japanese Military Administration Vol. 9 . | Manila Nichi Nichi Shimbun Sha, Inc. | | 139 |
| | The Official Journal of the Japanese Military Administration Vol. I . | Manila Nichi nichi Shimbun sha, Inc. | | 166 |
| | Official Letter Sent To Democratic Members of Commitee On Rules. Bonston, Jun 4, 1912 . | | | |
| | Official Motor Road and Tourist Guide . | Sugar News Company | 1931 | 207 |
| | Official Opinions of The Attorney-General of the Philippine Islands . | Phil. Islands- Bureau of Justice Attoney General Bureau of Printing | 1909 | 883 |
| | Official Opinions of the Attorney-General of the Philippine Islands . | Phil. Islands-Bureau of Justice Attorney-Geberal Bureau of Printing | 1929 | 849 |
| | Official Opinions of The Attorney-General of The Philippine Islands Vol. 3 . | | | 836 |
| | Official Opinions of The Attorney-General of the Philippine Islands Volume 1 . | Bureau of Public Printing | 1903 | 807 |
| | Official Proceedings of the first national Filipino business men's convention . | Nacional Filipino Businessmen's Convention. Ist, Manila Feb. 1929 | | 584 |
| | Official Proceedings of the First National Filipino Businessmen's Convention . | Loyal Press Manila | February 1929 | 666 |
| | Official Proceedings of the Second National Congress of Filipino Business Men . | Carmelo and Bauremann, Inc. | 1935 | 772 |
| | Official proceedings of the second national congress of Filipino business men November 19-22, 1935 . | | 1935 | 780 |
| | Official proceedings of the Second National Congress of Filipino Business Men, November 19-22, 1935 . | Carmel and Bauermann, Inc. | 1935 | 770 |
| Galang, Zoilo M. | Official program : Fifth anniversary celebration of the Republic of the Philippines . | | 1951 | 69 |
| | Official program : Fourth anniversary celebration of the Republic of the Philippines . | | 1950 | 65 |
| | Official program : Third anniversary celebration of the Republic of the Philippines . | | | 59 |
| | Official Program 1938 Bureau of Education Interscholastic Athletic Association Meet . | | 1938 | 57 |
| | Official Program and Souvenir Book of the Inaugaration of the Commonwealth Government . | | | |
| | Official Program and Souvenir Book of the Inaugaration of the Commonwealth Government . | | | |
| | Official Program Commemorating the Inauguration of Ramon Magsaysay as President of the Philippines and Carlos P Garcia as Vice President of the Philippines . | | 12/30/53 | 58 |
| | Official Program Commonwealth Of The Philippines 4th Anniv. . | | 1939 | 34 |
| | Official Program Commonwealth of The Philippines Fifth Anniversary Manila Nov 15, 1940 . | | | |
| | Official Program Commonwealth of the Philippines Fifth Anniversary Manila Nov. 15, 1940 . | | 1940 | 98 |
| | Official Program Commonwealth of The Philippines Fourth Anniversary Nov 15, 1939 . | | | |
| | Official Program Commonwealth of The Philippines Sixth Anniversary Manila Nov 15, 1941 . | | | |
| | Official Program Fifth Anniversary . | | 1951 | 69 |
| | Official Program First Anniversary of the Republic of the Philippines . | | 1947 | 48 |
| | Official Program Fourth Anniversary Celebration of the Republic of the Philippines . | | 1950 | 65 |
| | Official Program Fourth Inauguration 1957 including into office Carlos P Garcia President of the Philippines and Diosdado Macapagal Vice President of the Philippines . | | | 45 |
| | Official Program of the Eleventh Anniversary Celebration of the Republic of the Philippines . | | 07/04/57 | 82 |
| | Official Program of the Inaugaration of the Commonwealth of the Philippines and the induction into office of Manuel L. Quezon First President of the Philippines and Sergio Osmena First Vice President of the Philppines . | | | |
| | Official Program of the Inauguration of His Excellency Elpidio Quirino as President of the Philippines and the Honorable Fernando Lopez as Vice president of the Philippines . | | 1949 | 72 |
| | Official Program of the Inauguration of the Commonwealth of the Philippines and the induction into office of Maanuel L. Quezon and Sergio Osmena . | | 1935 | 96 |
| | Official Program Of The Inauguration Of The Philippines (Quezon&Osmena) . | | 1935 | 29 |
| | Official Program Of The Inauguration Of The Philippines (Roxas&Quirino) . | | 1946 | 40 |
| | Official Program of the Ninth Anniversary Celebration of the Republic of the Philippines . | | 07/04/55 | 58 |
| | Official Program Third Anniversary Celebration of the Republic of the Philippines . | | 1949 | 59 |
| | Official program, Commonwealth of the Philippines fifth Anniversary Manila November 15, 1940 . | | 1940 | 37 |
| | Official program, Commonwealth of the Philippines Sixth Anniversary Manila November 15, 1941 . | | 1941 | 28 |
| | Official program: Commonwealth of the Philippines,1939 . | | 1939 | 34 |
| | Official program: Commonwealth of the Philippines,1940 . | | 940 | 30 |
| | Official program: Commonwealth of the Philippines,1941 . | | 1941 | 28 |
| | Official program: inauguration of the Commonwealth of the Philippines, 1935 . | | 1935 | 29 |
| | Official program: inauguration of the Commonwealth of the Philippines, 1946 . | | 1946 | 37 |
| | An official pronouncing gazetteer and geographical dictionary of the Philippine Islands . | | | 460 |
| | Official receipt . | | | |
| | Official Register of the Officers and Employees in the Civil Service of the Philippine Islands . | | | 119 |
| | Official Roster of Officers and Employees in the Civil Service of the Philippine Islands . | Manila Bureau of Printing | 1924 | 244 |
| | Official Roster of Officers and Employees in the Civil Service of the Philippine Islands . | | | |
| | Official Roster of Officers and Employees in the Civil Service of the Philippine Islands . | | | |
| | Official Roster of Officers and Employees in the Civil Service of the Philippine Islands the government of the Philippine Islands Bureau of cilv Service July 1, 1915 . | Philippine Islands Bureau of Civil Service | 1915 | 152 |
| | Official Roster of Officers and Employees in the Civil Service of the Philippine Islands the government of the Philippine Islands Bureau of Civil Service July 1, 1916 . | Philippine Islands Bureau of Civil Service | 1916 | 152 |
| | Official Roster of officers and employees in the Civil Service of the Philippine Islands. December 31, 1927 . | Bureau of Printing | 1927 | 306 |
| | Official Roster of officers and employees in the Civil Service of the Philippine Islands. December 31, 1929 . | Bureau of Printing | 1929 | 323 |
| | Official Roster of officers and employees in the Civil Service of the Philippine Islands. July 1, 1925 . | Bureau of Printing | 1925 | 259 |
| | Official Roster of officers and employees in the Civil Service of the Philippine Islands. July 1, 1926Bureau of Printing . | | 1926 | 274 |
| | Official Roster of officers and employees in the Civil Service of the Philippine Islands. November 14, 1935 . | Bureau of Printing | 1935 | 306 |
| | Official Roster of The Board of Regents, Faculty Members Officers, And Employees . | | | |
| | Official Roster of the Officers and Employees in the Civil Service of the Phillipine Islands . | Bureau of Public Printing | 1904 | 143 |
| | Official Roster of the Officers and Employees in the Civil Service of the Phillipine Islands . | Bureau of Public Printing | 1923 | 227 |
| | Official Roster of the Officers and Employees in the Civil Service of the Phillipine Islands . | Bureau of Public Printing | 1923 | 243 |
| | Official Souvenir Program Inauguration of President Diosdado Macapagal and Vice President Emmanuel Pelaez . | | 12/30/61 | 46 |
| | The Official Warren Commission report on the assassination of Pres. John F. Kennedy . | Doubleday | 1964 | 987 |
| | Oficio Divino de la Iglesia Filipina Independiente Primera Parte Novisimo Evangelio . | | 1906 | 201 |
| | Oficio Divino de la Iglesia Filipina Independiente Primera Parte Novisimo Evangelio Segunda Parte Culto Eucaristico . | | 1906 | 245 |
| | Oficios de Noveleta y Cavite Viejo citando a Baldomero Aguinaldo que comparezca ante el Gobernador de la Provincia . | | | 9 |
| | Ofreciendo Servicios y Contestacion a Estas Cartas . | | | |
| | Oh Bouy Markers Guide to Manila . | | | 351 |
| | Oh pagsintang labis . | Aguinaldo, Rosalia L. | | 56 |
| | Oh... lalaki... . | Santos, Arsenio G. | | 13 |
| | An Ohio Woman in the Philippines . | Bronson Conger, Emily | 1904 | 197 |
| | El Ojo Humano. Productor de la vision, el don mas preciado que la Providencia otorgo al hombre . | Impreso por la Imp.de Santo Tomas | 1927 | 84 |
| | Old Bicol Stories And Others . | | | |
| | An old church . | | | 1 |
| | The Old Philippines' Industrial Development . | | | |
| | An old women: a sketch by Rizal . | | | 1 |
| | Oliver Cromwell And His Times . | | | |
| A del Rosario y Sales | Los Olores del Pasig Ensayos Micro-Quimicos . | Establecimiento Tipografico de "La Oceania Espanola" | 1886 | 53 |
| | Omater Dei Memento Mei . | | | |
| | Once a Chinese always a Chinese . | | 1988 | 207 |
| | Once cuentos propios . | | | 53 |
| | Once Upon These Isles . | Philippines University Manila. The Members of English, 15a, University of the Philippines | 1941 | 834 |
| Nestor Mata | One Came Back The Magsaysay Tragedy . | Philippine Publishers, Inc. | 1957 | 218 |
| | The One Hundred and One Best Songs 40th Edition . | Book Division of The Cable Company Chicago USA | | 106 |
| | One Hundred Countries one and one quarter billion people . | Paul G. Hoffman | 1960 | 63 |
| | One Hundred Fables . | | | |
| Jose Rizal | One Hundred Letters . | Philippine National Historical Society Manila | 1959 | 569 |
| Rizal, Jose A. | One hundred letters of Jose Rizal to his parents, brother, sisters, relatives . | Philippine National Historical Society | 1959 | 189 |
| | One Hundred Letters of Jose Rizal to his Parents, Brothers, Sisters, Relatives . | | | 584 |
| Brussel, J. | One Hundred Years Of American Humor . | | 1945 | 131 |
| Clark Lee | One Last Look Around . | | 1947 | 284 |
| Motizu, Lt. S. | One Nation, One Heart, One Republic . | | | 20 |
| Juan M. Galang | One Night in Philippines A Romance . | | 1928 | 53 |
| | One World in the Making: The United Nations (Second Edition) . | | | 118 |
| Cello Oligato | Only a Year Ago . | Sam Fox Publishing Co. | | 345 |
| | La Onomatopeya En El Idioma Tagalog . | | | |
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| | The Open City . | Mydans, Shelley Smith | 1945 | 256 |
| Barredo y Padagas, Antonio | Open Letter to President Sergio Osmena on the legality of the session of the Congress of the Philippines . | Bureau of Printing | 1945 | 30 |
| | Operaciones contra los mayoyaos salvajes de las islas Filipinas . | | 1847 | 16 |
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| Malcolm, George A. | Opinion and other legal memoranda, etc. prepared principally for the signature of the attorney-general of the Philippine Islands during the years 1911-1912 . | | 1911-1912 | 663 |
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| | Optarsa (Duendeng Itim) . | | | |
| Malumbres, Julian | Opusculos Sobre la Masoneria y Protestantismo . | Tip. Pontificia de la Universidad de Sto. Tomas | 1924 | 37 |
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| | Opvscvlvm in Qvo Dvcenta Et Septvaginta Qvatvor Ovaefita A Rr. Pp. Missionarijs Regni Tunkini . | | | |
| | Oracion Efricaz . | Divino Niso Jesus de Praga | 1905 | 2 |
| | Oracion Eucharistica Que En Accion De Gracias Por El Nacimiento De Los Serenisimos Infantes D. Carlos, Y D. Phelipe, Nietos De Nuestro Amado Rey Carlos 3. . | | | |
| | Oracion evangelica en la dedicacion de la sanda iglesia metropolitan . | Gafpar de los Reyes | 1673 | 56 |
| | Oracion Funebre En Las Exequias, . | | | |
| Peralta, Manue | Oracion funebre que en las honras celebradas por el Illmo Cabildo de la Santa Iglesia Metropolitana de Manilal . | Imp. del Colegio de Santo Tomas | 1861 | 14 |
| Fonseca, Joaquin | Oracion funebre que en las solemnes ecsequias celebradas por el escelentisimo ayuntamiento . | Manila | 1852 | 12 |
| Fonseca, Joaquin | Oracion funebre que en las solemnes honras celebradas en la iglesia de S. Pedro Telmo de Cavite por los naufragos del Malaspina . | Est. Tip. del Colegio de Santo Tomas | 1868 | 26 |
| Peralta, Manuel | Oracion funebre que en las solemnes honras celebradas por el Excmo. e Illmo. Sr. Arzobispo y Cabildo Metroplitano de Manila a la memoria y en sufragio de los valientes marinos que murieron en las operaciones del Callao . | Imp. de Ramirez y Giraudier | 1866 | 12 |
| Garcia, Vicente | Oracion funebre, que en las solemnes honras celebradas en la Catedral de Nueva Caceres . | Imp. Del Colegio de Sta. Tomas | 1862 | 15 |
| | Oracion Fvnebre En Las Exeqvias . | | | |
| | Oracion Fvnebre En Las Exeqvias . | | | |
| | Oracion Fvnebre En Las HonrrasQve . | | | |
| | Oracion Panegirica A Maria Santissima En El Misterio De Su Inmaculada Concepcion Que En El Dia 8: De Diciembre Del Ano De 1785. . | | | |
| | Oracion Panegirica Al Principe De Lois Apostoles San Pedro Que En El Dia 29. De Junio Del Ano De 1786. . | | | |
| | Oracion Panegirica Del Angelico Doctor Santo Thomas De Aquino. . | | | |
| | Oracion panegyrica, qve en la solemne fiesta. Qve el . | Amador, Jvan | 1779 | 27 |
| | Oracion Panegyrico - Moral en la Solemne Fiesta qve la Provincia deel Ssmo Rosario . | Fr. Zvrita, Diego | 1764 | 57 |
| | Las Oraciones Mas Precisas Y La Doctrina Esencial Que Ha De Saberse De Memoria . | | | |
| Ward, Charles A. | Oracles of Nostradamus . | Modern Library | 1940 | 405 |
| | Ang Orakulo Ni Lola Basiang . | | | |
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| Brewer, John M. | Oral English . | | 1916 | 403 |
| | Oratio panegirica svper salvtationem. . | Simon Pinpin Inprefor | 1643 | 53 |
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| | Orden de Caballeros de Rizal . | | 1951 | 42 |
| p. Norberto del Prado | La Orden de Predicadores . | Tipografia del Colegio de Santo Tomas | 1886 | 60 |
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| | Orden Ejecutiva No.9 . | | | 10 |
| De Ramirez, Imprenta Giraudier | Ordenanza De Los Tribunales De Cuentas De Ultramar . | | 1861 | 69 |
| | Ordenanza Instrvtiva para el Regimen,y Govierno de los Capitanes Corsarios Contra Moro De Este Islas Philipinas . | | | 60 |
| De Ramirez y Gibaudier | Ordenanza para la Casa Provisional de Moneda de Filipinas . | | 1862 | 39 |
| | Ordenanza qve se ha de Observar en la Capital de Manila. . | de Arandia, Pedro Manuel y Santeftevan | 1756 | 15 |
| | Ordenanzas cuerpo de Policia Ciudad de Vigan . | Vigan, Ilocos Sur. Municipal Board | 1903 | 13 |
| | Ordenanzas de Marina, Para los Navios del Rey, de las Islas Philipinas . | Arandia, Pedro Manuel de | 1757 | 167 |
| | Ordenanzas Del Consejo Real De Las Indias . | | | |
| | Ordenanzas Del Consejo Real De Las Indias, . | | | |
| | Ordenanzas Municipales De La Ciudad De Manila . | | | |
| | Ordenanzas Para El Archivo General De Indias. . | | | |
| | Ordenanzas Reales Para El Tribunal Y Real Contaduria De Hacienda 1739 . | | | |
| Manuel Blanco | Ordenanzas Revisadas de 1935 del Municipio de Iloilo . | Bureau of Printing | 1936 | 234 |
| | Ordenanzas Y Constitvciones . | | | |
| | Ordenanzas, Y Constituciones De La Sancta Misericordia De La Insigne Ciudad De Manila Reformadas Conforme Alestado, Y Disposicion De La Tierra Por Los Hermanos De La Dicha Hermandan, Conforme Por Las Ordenanzas De La Ciudad De Lisboa Se Dispo. Ne, Y Aunados A Eila El Ano De 1606. . | | | |
| | Order of the Knights of Rizal Annual Report 197 Supreme Council . | | 1973 | 105 |
| | Order of the Knights of Rizal Annual Supreme Council Manila 1974 Annual Report . | | 1974 | 118 |
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| | An order of the Rector to grant Jose Rizal his licentiate in Medicine, 16 June 1887 . | | | 1 |
| De Castro, Joannes | Ordinaciones generales . | | | 14 |
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| De Ramirez y Giraudier | Organizacion Atribuciones y Procedimientos de los Consejos de Administracion de Ultramar . | | 1862 | 93 |
| Imp. y Lit. de Manuel Perez | Organizacion, atribuciones y relaciones de las dependencias del estado . | | 1892 | 287 |
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| | Orientacion Social Y Economica . | | | |
| del Castillo, Jose Lopez | Orientaciones Diplomaticas . | | 1939 | 345 |
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| | Oriental Animal Stories . | | | |
| Verzosa, Paul Rodriguez | Oriental Art . | | | 21 |
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| | Origen De Los Indios De El Nuevo Mundo, E Indias Occidentales, Averiguado Con Discurso De Opiniones Por El Padre Presentado Fr. Gregorio Garcia, De La Orden De Predicadores . | | | |
| D. Rafael Garcia Lopez | Origen e historia del jardin botanico y de la escuel de agricultura de Filipinas . | Imp.a Cargo de Juan Iniesta | 1872 | 59 |
| Jaime Martinez | Origen y estado actual de los males habituales . | | 1840 | 68 |
| | Origen, Vida, Muerte Y Pulverizacion De Los Astros . | | | |
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| | El Origin De Los Diferentes Dialectos De Filipinas . | | | |
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| | Origin of the Malayan Filipinos . | | | |
| | Origin of The Malayan Filipinos – Vol. 1 – Part 1. . | | | |
| | Origin of The Malayan Filipinos – Vol. 1 – Part 1. . | | | |
| Raymundo C. Banas | Original Photograhs of Filipino Musicians . | | | 37 |
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| | Origins, legends and myths . | | | 57 |
| | Orosman at Zafira : . | Baltazar, Francisco. | 1877 | 256 |
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| | The Osaka Mainichi: The paper you should read . | The Osaka Mainichi Publishing Co., Ltd. | | 738 |
| | Osias On Education In A Democracy . | | | |
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| | Osmena not Eligible for the Presidency of the Philippines in the Coming Elections of April 23, 1946 . | | | |
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| | Otro Amigo Entrañable de Rizal . | | | 8 |
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| | Our America . | | | |
| | Our Appeals To The U. S. Congress . | | | |
| Eulogio B Rodriguez | Our Better Nature Versus a House Divided Againts Itself . | General Printing Press | | 757 |
| Davis, Oscar King | Our conquests in the Pacific . | Frederick A. Stokes Company | 1899 | 376 |
| | Our Country . | | | |
| Isidro, Antonio | Our Country . | D. P. Perez Company | 1938 | 289 |
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| Antonio Isidro | Our Country: Nationalism Series Book Five . | Oriental Commercial Company, Inc. | | 291 |
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| | Our Country'S Flag And Anthem 1930 . | | | |
| | Our Country'S Flag And Anthem 1930 . | | | |
| | Our Country'S Flag And Anthem 1936 . | | | |
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| | Our Economic World . | | | |
| | Our Economic World . | | | 539 |
| Jose P. Laurel | Our Economy-What Can Be Done . | | 1956 | 168 |
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| | Our Flag Our Country Our Constitution . | | | 17 |
| | Our Forests Speech Delivered By The Hon. Sergio Osmenia . | | | |
| Quisumbing, Eduardo and Ty Catalina, Velasquez | Our Friends of the Flower World . | S.E. Macaraig Co. | 1937 | 116 |
| | Our Government: What it is Doing for Us . | | 1940 | 213 |
| Pura Santillan-Castrence | Our Heros Mother . | | 1930 | 11 |
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| | Our Independence is at hand . | Bureau of Information and Public Security | | 13 |
| King, Edward J. | Our Industrial Empire Assaults The Philippines . | Government Printing Office | 1936 | 16 |
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| | Our Islands And Their People . | | | |
| de Olivares, Jose | Our islands and their people as seen with camera and pencil . | N. D. Thompson Pub. Co. | 1899 | 373 |
| | Our Language Problem Remains Unsolved . | Martin, D. | | 6 |
| | Our Little Philippine Cousin . | | | |
| Verzosa, Paul Rodriguez | Our moral code : in the light of Bushido . | | 1940 | 16 |
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| | Our Struggle Independence . | | 1955 | 23 |
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| | Outline The Economic Conditions In The Philippines . | | | |
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| | Outlines of Greek History: With A Survey of Ancient Oriental Nations . | | | 385 |
| | Outlines of Roman History . | | | |
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| | Outlines of The Law of Persons And Family Relations . | | | |
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