Palaeontology - Palaeontological Association (Palaeontological Association, 1994)

Palaeontology - Palaeontological Association (Palaeontological Association, 1998)

Papers read before the Purbeck Society - Purbeck Society. (1856)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1908)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1911)

Parasitology (Cambridge University Press, 1921)

Pesche e peschiere antiche e moderne nell'Etruria marittima - Del Rosso, Raffaele (Piaggi, 1905)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1910)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1911)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1917)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1919)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1920)

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

Phylogeny and evolution of Crustacea : proceedings of a conference held at Cambridge, Mass, March 6-8, 1962 - Whittington, H. B. (Harry Blackmore), 1916 -2010 (Museum of Comparative Zoology, 1963)

Die Physiologie der facettirten Augen von Krebsen und Insecten : eine Studie - Exner, Siegmund, 1846 -1926 (Franz Deuticke, 1891)

Die Physiologie des Kreislaufes - Tigerstedt, Robert, 1853 -1923 (Vereinigung Wissensachaftlicher Verleger Walter de Gruyter, 1921)

Physiologie - Richet, Charles Robert, 1850 -1935 (Alcan, 1893)

The pictorial museum of animated nature ... - Knight, Charles, 1791 -1873 (C. Knight, 1844)

The pictorial museum of animated nature - Knight, Charles, 1791 -1873 (C. Cox, 1844)

The Pliocene deposits of Britain - Reid, Clement, 1853 -1916 (Printed for HMSO by Eyre and Spottiswoode, 1890)

Pomona College journal of entomology - Pomona College (Claremont, Calif.). Department of Biology. (Published under the patronage of Ontario-Cucamonga Citrus Association by the Dept. of Biology of Pomona College, 1912)

Ponds and rock pools : with hints on collecting for and the management of the micro-aquarium - Scherren, Henry, 1842 -1911 (Religious Tract Society, 1894)

Popular history of the aquarium of marine and fresh-water animals and plants - Sowerby, George Brettingham, 1788 -1854 (Lovell Reeve, 1857)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1911)

Problems of relative growth - Huxley, Julian, 1887 -1975 (L. MacVeagh, The Dial Press, 1932)

Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1987)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1905)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1907)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1919)

Proceedings and transactions of the Natural History Society of Glasgow - Natural History Society of Glasgow. (The Society, 1883)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1889)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1900)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1902)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1850)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1902)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1900)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1980)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1995)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 2003)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1903)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1935)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1939)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1954)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1970)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2001)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2009)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2007)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1980)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1935)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1989)

Proceedings of the Literary and Philosophical Society of Manchester - Literary; Philosophical Society of Manchester. (The Society, 1864)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1960)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1962)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1971)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1930)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1976)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1978)

Proceedings of the National Shellfisheries Association - National Shellfisheries Association. (Published for the National Shellfisheries Association by MPG Communications, 1979)

Proceedings of the Natural History Society of Glasgow - Natural History Society of Glasgow. (Natural History Society of Glasgow, 1858)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1983)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 2001)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 2002)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 2010)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1911)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1863)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1878)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1885)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1908)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1888)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1907)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1914)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1917)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1885)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1893)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1894)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1896)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1902)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1901)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1871)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1915)

Procès-verbaux - Société Linnéenne de Bordeaux. (1925)

Procès-verbaux - Société Linnéenne de Bordeaux. (1933)

Procès-verbaux - Société Linnéenne de Bordeaux. (1962)

Prodromus faunae mediterraneae, sive Descriptio animalium maris Mediterranei incolarum, quam comparata silva rerum quatenus innotuit, adiectis locis et nominibus vulgaribus eorumque auctoribus - Carus, Julius Victor, 1823 -1903 (E. Schweizerbart, 1885)

Protozoa in biological research - Calkins, Gary N. (Gary Nathan), 1869 -1943 (Columbia University Press, 1941)