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Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1841)

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Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1887)

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1888)

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Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 2010)

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Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1879)

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Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1879)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1895)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1902)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1897)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1900)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1909)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1916)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1923)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1885)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1894)

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Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1861)

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Procès-verbaux - Société Linnéenne de Bordeaux. (1963)

Processing oceanographic data - LaFond, Eugene Cecil, 1909 -2002 (U.S. Navy, Hydrographic Office, 1951)

Productivity measurements in the world ocean - Capurro, Luis R. A. (Dept. of Oceanography and Meteorology, Agricultural and Mechanical College of Texas, 1961)

Programa de un curso de zoologia - Dugès, Alfredo (Imprenta del Estado a cargo de Justo Palencia, 1878)

Promenades au Jardin des plantes, a la ménagerie et dans les galeries du Muséum d'histoire naturelle ... - Pujoulx, J. B. (Jean Baptiste), 1762 -1821 (Librairie Économique, 1803)

Promtuarium rerum naturalium et artificialium Vratislaviense : praecipue quas collegit D.Io. Christianus Kundmann, medicus vratislaviensis - Kundmann, Johann Christian, 1684 -1751 (Apud Michaelem Hubertum, 1726)

Protozoa - Schwager, Conrad. (C.F. Winter, 1880)