Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1883)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1885)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1886)

A photograph and description of Masturus lanceolatus taken at Tahiti, May 1930 : the sixteenth adult specimen on record - Gudger, E. W. (Eugene Willis), 1866 -1956 (The American Museum of Natural History, 1935)

A Phylogenetic analysis and taxonomy of iguanian lizards (Reptilia, Squamata) - Etheridge, Richard, 1929 - (University of Kansas, 1989)

A phylogenetic classification of animals (for the use of students) - Herdman, W. A. Sir, (William Abbott), 1858 -1924 (Macmillan and Co, 1885)

Phylogenetic relationships and taxonomic revision of the Blenniid Fish genera Cirripectes and Scartichthys - Williams, Jeffrey T. (1986)

Phylogenetic studies of North American minnows : with emphasis on the genus Cyprinella (Teleostei, Cypriniformes) - Mayden, Richard L. (University of Kansas, 1989)

Phylogenetics of Teleogramma, a riverine clade of African cichlid fishes, with a description of the deepwater molluskivore–Teleogramma obamaorum–from the lower reaches of the middle Congo River - Stiassny, Melanie L. J. (American Museum of Natural History, 2015)

Phylogeny and evolutionary history of Old World suboscine birds (Aves, Eurylaimides) - Cracraft, Joel (American Museum of Natural History, 2006)

Phylogeny and taxonomic revision of Nuchequula Whitley 1932 (Teleostei, Leiognathidae), with the description of a new species - Sparks, John S. (American Museum of Natural History, 2007)

Phylogeny and taxonomic revision of the endemic Malagasy genus Ptychochromis (Teleostei, Cichlidae), with the description of five new species and a diagnosis for Katria, new genus - Sparks, John S. (American Museum of Natural History, 2006)

Die Physiologie des Geruchs - Junker von Langegg, A., (W. Engelmann, 1895)

The physiology and pharmacology of the pituitary body - Van Dyke, Harry Benjamin, 1895 - (The University of Chicago Press, 1939)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2024)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2023)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2025)

Pleistocene mammals and paleoecology of the western Amazon - Rancy, Alceu, 1949 - (1991)

Poey's ichthyological memoirs - Poey, Felipe, 1799 -1891 (s.n, 1870)

Les poissons du basin du Congo - Boulenger, George Albert 1858 -1937 (État indépendant du Congo, 1901)

Poissons provenant des campagnes du yacht Princesse-Alice (1901-1910) - Zugmayer, Eric (1911)

The Popular educator: a complete encyclopaedia of elementary, advanced and technical education (Cassell, 1888)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1902)

Popular Science Review (1868)

Popular Science Review (1871)

Popular Science Review (1872)

Popular Science Review (1878)

Popular Science Review (1881)

A popular zoology - Jenks, J. W. P. 1819 -1894 (A.S. Barnes & Company, 1887)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1962)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1950)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1969)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1978)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 2001)

Practical lessons in science - Scovell, J. T. (Josiah Thomas), 1841 - (The Werner Co, 1895)

Preliminary report on the fish and fisheries of Ontario - Wright, R. Ramsay (Robert Ramsay), 1852 -1933 (s.n, 1892)

The primitive streak and notochordal canal in Chelonia - Davenport, Gertrude Anna Crotty, 1866 - (Ginn, 1896)

Principles of animal biology - Shull, A. Franklin (Aaron Franklin), 1881 -1961 (McGraw-Hill, 1920)

Principles of animal biology - Shull, A. Franklin (Aaron Franklin), 1881 -1961 (McGraw-Hill book company, inc, 1946)

The principles of biology, by J. I. Hamaker - Hamaker, John Irvin, 1869 - (P. Blakiston, 1913)

The principles of biology - Hamaker, J. I. (John Irvin), 1869 - (P. Blakiston's Sons & Co, 1913)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders Company, 1917)

Principles of economic zoo̤logy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W.B. Saunders, 1915)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders company, 1912)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders, 1917)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W.B. Saunders, 1912)

Principles of zoölogy : a guide for beginners - Schiedt, Richard Francis Conrad, 1859 -1951 (Examiner Printing House, 1892)

Proceedings - Dorset Natural History; Archaeological Society.

Proceedings (and Annual Report) of the Holmesdale Natural History Club, Reigate - Holmesdale Natural History Club. (1865)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1891)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1896)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1901)

The Proceedings and transactions of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1902)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1886)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1912)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1904)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1906)

Proceedings - Dorset Natural History and Archaeological Society - Dorset Natural History; Archaeological Society. (1877)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1861)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1864)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1867)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1868)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1877)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1885)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1913)

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

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1869)

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1877)

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1883)

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1904)

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1908)

Proceedings of the Asiatic Society of Bengal - Asiatic Society of Bengal ([The Society], 1877)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1913)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1967)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1975)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1976)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1977)