Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1897)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1922)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2010)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1972)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1973)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1974)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1975)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1978)

Odontographie. Vergleichende Darstellung des Zahnsystemes der lebenden und fossilen Wirbelthiere - Giebel, C. (Christoph), 1820 -1881 (A. Abel, 1855)

On Balantidium coli (Malmsten) and Balantidium suis (sp. nov.) with an account of their neuromotor apparatus - McDonald, James Daley, 1892 - (University of California press, 1922)

On the geology and natural history of the upper Missouri :Being the substance of a report made to Lieut. G.K. Warren, T.E. U.S.A - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Printed by C. Sherman & son, 1862)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (Frank H. Lattin, 1898)

Ornithologists' and oologists' manual consisting of a complete list of all North American birds, with prices of their eggs and skins, also an exhaustive line of ornithogists', oologists', and taxidermists' supplies, valuable information for the amateur, recipes - Webb, Walter Freeman, 1869 - (W.F. Webb, 1895)

Our living world; an artistic edition of the Rev. J. G. Wood's Natural history of animate creation - Wood, J. G. (John George), 1827 -1889 (S. Hess, 1885)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1875)

Paleontological investigations at Mineral Hill Cave - Broughton, Jack M. (U.S. Department of the Interior, Bureau of Land Management, Elko Field Office, 2004)

Pamphlets on forestry in Kansas (1900)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1940)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1951)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1953)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1973)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1875)

Papers and published notes : 1869 to 1876 - Goode, G. Brown (George Brown), 1851 -1896 (1869)

Papers concerning the palæontology of California, Arizona, and Idaho - Merriam, John C. (John Campbell), 1869 -1945 (Carnegie Institution of Washington, 1934)

Papers in vertebrate paleontology honoring Robert Warren Wilson - Carnegie Museum of Natural History (Carnegie Museum of Natural History, 1984)

Les parasites et les maladies parasitaires : chez l'homme, les animaux domestiques et les animaux sauvages : avec lesquels ils peuvent étre en contact: insectes, arachnides, crustacés - Mégnin, Pierre, 1828 -1906 (Masson, 1880)

A Partial bibliography of the mammals of Wyoming and adjacent states with special reference to density and habitat affinity - United States. Bureau of Land Management. (Wyoming Game & Fish Department, 1978)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Physiological ecology of fossorial mammals : A comparative study - Contreras, Luis C. (Luis Carlos), 1953 - (1983)

The Plant world - Plant World Association. (Plant World Association [etc.], 1910)

Pocket gopher food habits on two disturbed forest sites in central Arizona - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1984)

Poisoning and trapping pocket gophers to protect conifers in northeastern Oregon - United States. Forest Service. (Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1979)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1875)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1895)

Popular Science Review (1875)

The population phenetics and behavioral ecology of the Florida scrub lizard (Sceloporus woodi) - Jackson, James F (1972)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1961)

A preliminary report on the biology of Harding County, northwestern South Dakota - Visher, Stephen Sargent, 1887 -1967 (State Publishing Co, 1914)

A preliminary survey of the rodents and lagomorphs in Central and Southern Alberta - University of Alberta. Department of Zoology. (the University of Alberta, 1951)

Preparations of mammalian karyotypes under field conditions - Baker, Robert J. (Museum of Texas Tech University, 2003)

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)

Problems of American geology; a series of lectures dealing with some of the problems of the Canadian shield and of the Cordilleras - Walcott, Charles D. (Charles Doolittle), 1850 -1927 (Yale University Press; [etc., etc.], 1915)

Proboscidea : a monograph of the discovery, evolution, migration and extinction of the mastodonts and elephants of the world - Osborn, Henry Fairfield, 1857 -1935 (Published on the J. Pierpont Morgan Fund by the trustees of the American Museum of Natural History, 1936)

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, 1916)

Proceedings and transactions of the Texas Academy of Science - Texas Academy of Science. (The Academy, 1941)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1852)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1854)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1857)

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, 1875)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1882)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1893)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1895)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1903)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1904)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1905)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1914)

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 Asiatic Society of Bengal - Asiatic Society of Bengal ([The Society], 1875)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1892)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1893)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1897)