Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1943)

Proceedings of the Washington Academy of Sciences - Washington Academy of Sciences (Washington, D.C.) (Washington Academy of Sciences, 1900)

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

Proceedings, Symposium on Cheatgrass Invasion, Shrub Die-off and Other Aspects of Shrub Biology and Management : Las Vegas, NV, April 5-7, 1989 - Intermountain Research Station (Ogden, Utah) (Intermountain Research Station, Forest Service, U.S. Dept. of Agriculture, 1990)

Procès-verbaux - Société Linnéenne de Bordeaux. (1895)

The protection of cotton, December 1984 - February 1989 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Environmental Protection Agency, Office of Pesticide Programs, 1989)

The protection of pome fruits, March 1985-May 1992 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (National Agricultural Library, 1992)

Psaenythisca, a new genus of bees from South America (Apoidea, Andrenidae, Protandrenini) with a description of the nesting biology and immature stages of one species - Ramos, Kelli S. (American Museum of Natural History, 2014)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1874)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1877)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1880)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1890)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1893)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1891)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1896)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1899)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1905)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1906)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1924)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1925)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1927)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1929)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1947)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1970)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1975)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1976)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1978)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1980)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1981)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1982)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1984)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1985)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1987)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1988)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2009)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2010)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2011)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2012)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2013)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2014)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2015)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2016)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 2017)