Pacific coast avifauna - Cooper Ornithological Club. (Cooper Ornithological Club, 1919)

Pacific coast avifauna - Cooper Ornithological Club. (Cooper Ornithological Club, 1917)

Pacific coast avifauna - Cooper Ornithological Club. (Cooper Ornithological Club, 1921)

Pacific science - University of Hawaii. (University Press of Hawaii, 1947)

Pacific science - University of Hawaii. (University Press of Hawaii, 1951)

Pacific science - University of Hawaii. (University Press of Hawaii, 1968)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 1995)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2004)

Palaeontology - Palaeontological Association (Palaeontological Association, 1992)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (5480 to 6070), 1968, PMS laboratory forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt banding information (Dead on arrival [DOA] / release), Fall 1969, PMS banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1969)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (6071 to 6218), 1968, banding forms - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1968)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (2910 to 3100), 1967 - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1967)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : skeletons numeric list (1966)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : Egypt specimens (3501 to 4000), 1967 - National Museum of Natural History (U.S.) Palearctic Migratory Bird Survey (1967)

Palestine Exploration Fund : quarterly statement - Palestine Exploration Fund. (The Fund, 1888)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1888)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1907)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1916)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1944)

Papers presented to the World's Congress on Ornithology - Coues, Elliott, 1842 -1899 (Charles H. Sergel Co, 1896)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1916)

Parasitology (Cambridge University Press, 1922)

Partnerships for sustainable forest ecosystem management : fifth Mexico/U.S. biennial symposium : October 17-20, 1994, Guadalajara, Jalisco, Mexico - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1995)

The passenger pigeon in Ontario - Royal Ontario Museum of Zoology. (University of Toronto Press, 1935)

The passerine birds of Ceylon - Wait, W. E. (Walter Ernest), 1878 - (s.n, 1922)

P.D. Skaar's Montana bird distribution - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2012)

P.D. Skaar's Montana bird distribution - Bergeron, Dwight. (Montana Natural Heritage Program, 1992)

P.D. Skaar's Montana bird distribution - Skaar, Palmer David. (Montana Natural Heritage Program, 1996)

Pennaraptoran theropod dinosaurs : past progress and new frontiers - Novas, Fernando E (American Museum of Natural History, 2020)

Pennsylvania bird life; a manual of the birds of Pennsylvania; treating especially of their food, from examinations of several thousand stomachs, made during all seasons of the year, with descriptions of the birds, their nests, eggs and habits - Warren, Benjamin Harry, 1858 -1926 (Penn'a., Pub by the author, 1892)

Pepacton - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1902)

Pepacton - Burroughs, John, 1837 -1921 (Houghton Mifflin company, 1909)

Pepacton - Burroughs, John, 1837 -1921 (1897)

Periódico zoológico - Sociedad Entomológica Argentina. (Sociedad Entomica Argentina, 1874)

Pest control by chemical, biological, genetic, and physical means; a symposium. Chairman: E. F. Knipling ... presented at the meeting of the American Association for the Advancement of Science, Section 0 on Agriculture, December 26-31, 1964 - Knipling, E. F. (Agricultural Research Service, U.S. Dept. of Agriculture, 1966)

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

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

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain. (J. & A. Churchill, 1880)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1920)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1866)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1991)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1992)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1994)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1995)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1996)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1997)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1998)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1999)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2000)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2001)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2003)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2004)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2005)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2006)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2007)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2008)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2009)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2010)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2011)