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

Pests not known to occur in the United States or of limited distribution. 81. European spruce beetle - Anderson, D. M. (1987)

Die Pflanzenwelt - Warburg, Otto, 1859 -1938 (Bibliographisches Institut, 1913)

Die Pflanzenwelt Norwegens. Ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (A.W. Brögger, 1873)

Die Pflanzenwelt Norwegens : ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (1873)

Phaeocollybia of Pacific Northwest North America - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, Salem District, 2008)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain (J. & A. Churchill, 1868)

Phase I, wildlife impact assessment and summary of previous mitigation related to hydroelectric projects in Montana : volume two (B), Clark Fork River projects, Cabinet Gorge and Noxon Rapids Dams –operator, Washington Water Power Company - Olsen, Arnold. (Bonneville Power Administration, Division of Fish and Wildlife, 1984)

Phenology of common forest flora of the northern Rockies, 1928 to 1937 - Intermountain Forest; Range Experiment Station (Ogden, Utah) (Intermountain Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1980)

Physiological responses of old growth ponderosa pine and western larch to restoration cutting and burning treatments - United States. Forest Service. ([USDA Forest Service], 2001)

A phytogeographic and taxonomic study of the southern California trees and shrubs - Abrams, Le Roy, 1874 -1956 (1910)

Phytogeographic studies in the Peace and upper Liard river regions, Canada, with a catalogue of the vascular plants - Raup, Hugh M. (Hugh Miller), 1901 -1995 (Arnold Arboretum of Harvard university, 1934)

Phytogeographic survey of North America. A consideration of the phytogeography of the North American continent, including Mexico, Central America and the West Indies, together with the evolution of North American plant distribution - Harshberger, John W. (John William), 1869 -1929 (W. Engelmann, 1911)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1948)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1970)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1981)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1983)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1990)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1997)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1998)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2015)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2016)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2017)

Phytoneuron (Guy L. Nesom, 2012)

Phytoneuron (Guy L. Nesom, 2013)

Phytoneuron (Guy L. Nesom, 2015)

Phytoneuron (Guy L. Nesom, 2011)

Phytoneuron (Guy L. Nesom, 2018)

Phytoneuron (Guy L. Nesom, 2020)

Pinaceae, Rutaceae, Meliaceae, Anacardiaceae, Tamaricaceae, Cornaceae, Oleaceae, Bignoniaceae of Nevada - Little, Elbert L. (Elbert Luther), 1907 -2004 (Plant Industry Station, 1956)

Pine shoot beetle program manual - United States. Animal; Plant Health Inspection Service. Plant Protection; Quarantine Programs. (U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, 1998)

The Pine trees of the Rocky Mountain region (U.S. Dept. of Agriculture, 1917)

Pinegrass, an important forage in interior B.C - Quinton, Dee A. (Research Branch, Agriculture Canada, 1986)

The pines of Mexico - Shaw, George Russell, 1848 - (J.R. Ruiter, 1909)

The pinetum: being a synopsis of all the coniferous plants at present known, with descriptins, history and synonyms, and a comprehensive systematic index - Gordon, George, 1806 -1879 (H. G. Bohn, 1875)

The pinetum : being a synopsis of all the coniferous plants at present known, with descriptions, history and synonyms, and comprising nearly one hundred new kinds - Glendinning, Robert. (H.G. Bohn, 1858)

The pinetum: being a synopsis of all the coniferous plants at present known, with descriptions, history and synonyms, and a comprehensive systematic index - Gordon, George, 1806 -1879 (H.G. Bohn [etc.], 1880)

The pinetum Britannicum : a descriptive account of hardy coniferous trees cultivated in Great Britain - Ravenscroft, Edward, 1816 -1890 (W. Blackwood & Sons, 1884)

Pinophyta (Gymnosperms) of New York State - Cope, Edward A., 1948 - (University of the State of New York, the State Education Dept, 1990)

The pinus contorta vegetation of Banff and Jasper National Parks - University of Alberta. Department of Botany. (University of Alberta, 1969)

Pinus contorta X banksiana hybrids tested in northern Rocky Mountains - Intermountain Forest; Range Experiment Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest & Range Experiment Station, 1970)

Pittonia :a series of papers relating to botany and botanists - Greene, Edward Lee, 1843 -1915 (Doxey & Co. [etc.], 1896)

Plant associations of region two : potential plant communities of Wyoming, South Dakota, Nebraska, Colorado, and Kansas - Johnston, Barry C. (USDA Forest Service, Rocky Mountain Region, 1987)

Plant bugs on fruit crops in Canada : Heteroptera: Miridae - Kelton, Leonard A. (Research Branch, Agriculture Canada, 1982)

Plant communities of Northeastern Montana : a first approximation - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1995)

Plant communities of the Blue Mountains in eastern Oregon and southeastern Washington - United States. Forest Service. (U.S.D.A. Forest Service, Pacific Northwest Region, 1973)