Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1961)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1987)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1990)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1967)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1964)

Proceedings of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1888)

Proceedings of the California Academy of Sciences. 3rd ser., Botany - California Academy of Sciences (The Academy, 1897)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1914)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1915)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1919)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1932)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1935)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1956)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1953)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1963)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1962)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1990)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2018)

Proceedings of the ... Conference on Southern Forest Tree Improvement - United States. Forest Service. (Eastern Tree Seed Laboratory in cooperation with Southern Area, State Private Forestry and Region 8, U.S. Forest Service, 1971)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1897)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1939)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1944)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1948)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1956)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1957)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1958)

Proceedings of the Entomological Society of Ontario - Entomological Society of Ontario. (Entomological Society of Ontario, 1984)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1906)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1922)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1973)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1974)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1985)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1986)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1987)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2000)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2002)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2003)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2007)

Proceedings of the Fifth Lake States Forest Tree Improvement Conference, September 19 & 20, 1961 - Lake States Forest Experiment Station (Saint Paul, Minn.) (Lake States Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1962)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1915)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1914)

Proceedings of the International conference on plant hardiness and acclimatization, 1907, held in the rooms of the American institute of the city of New York and in the Museum building of the New York botanical garden, october 1st to 3rd, 1907 (1910)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1902)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1905)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1916)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1917)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1922)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1923)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1924)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1929)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1928)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1950)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1961)

Proceedings of the ninth Southern Conference on Forest Tree Improvement held at Athens, Georgia January 8 and 9, 1957 - Tennessee Valley Authority. Division of Forestry Development. (Eastern Tree Seed Laboratory, 1967)

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

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1875)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1918)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1916)

Proceedings of the sixteenth Southern Forest Tree Improvement Conference : [held] May 27-28, 1981, Virginia Polytechnic Institute and State University, Blacksburg, Va - Southern Forest Tree Improvement Committee. (U.S. Forest Sciences Laboratory, 1981)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1885)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1917)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1921)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1944)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1952)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1954)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1966)

Proceedings of the Washington Academy of Sciences - Washington Academy of Sciences (Washington, D.C.) (Washington Academy of Sciences, 1910)

Proceedings : stand density management : using the planning tools, a conference held in Edmonton, Alberta, Canada, November 23 & 24, 1998 - Alberta. Alberta Environmental Protection. (Clear Lake Ltd, 1999)

Proceedings–Symposium on Shrub Ecophysiology and Biotechnology, Logan, Utah, June 30-July 2, 1987 - Intermountain Research Station (Ogden, Utah) (Intermountain Research Station, Forest Service, U.S. Dept. of Agriculture, 1989)

Proceedings, Western Forest [sic] Nursery Council-Intermountain Nurseryman's Association combined meeting, August 14-16, 1984, Coeur d'Alene, Idaho - Landis, Thomas D. (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1985)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1868)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1873)

Production and product recovery for complete tree utilization in the northern Rockies - Intermountain Forest; Range Experiment Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1983)

Production of lumber, lath, and shingles in 1916 - Smith, Franklin H. (Franklin Howard), 1877 - (U.S. Dept. of Agriculture, 1918)

Progress report : Trickle Mountain research area [report no. 2] - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, Denver Service Center, 1978)

Progress report : Trickle Mountain research study [report no. 2] - Colorado State University. (U.S. Department of the Interior, Bureau of Land Management, Denver Service Center, 1978)

Progressus rei botanicae = Fortschritte der Botanik = Progrès de la botanique = Progress of botany - Association internationale des botanistes. (G. Fischer, 1914)

ProHort - Center for Urban Horticulture (1988)

The propagation of plants ; giving the principles which govern the development and growth of plants, their botanical affinities and peculiar properties; also, descriptions of the process by which varieties and species are crossed or hybridized, and the many different methods by which cultivated plants may be propagated and multiplied - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd, 1887)

The propagation of plants, giving the principles which govern the development and growth of plants, their botanical affinities and peculiar properties; also, descriptions of the process by which varieties and species are crossed or hybridized, and the many different methods by which cultivated plants may be propagated and multiplied - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd co, 1887)

Proposed regulations by the Animal and Plant Health Inspection Service to establish prohibitions and restrictions concerning imported nonmanufactured wood articles : hearing before the Subcommittee on Specialty Crops and Natural Resources of the Committee on Agriculture, House of Representatives, One Hundred Third Congress, second session, June 29, 1994 - United States. Congress. House. Committee on Agriculture. (U.S. G.P.O, 1995)

Le propriétaire-planteur; semer et planter traité pratique et économique des reboisements et des plantations des parcs et jardins - Cannon, David (L. Laveur, 1906)

Protecting and enhancing America's forests and rangelands : 1986 research accomplishments - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, 1987)

The protection of small fruits and berries, 1980-April 1989 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1989)

The protection of soybeans, January 1980-November 1984 : citations from Agricola concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1985)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1888)

Pruning evergreens and deciduous trees and shrubs - Giles, F. A. (Floyd A.) (University of Illinois at Urbana-Champaign, College of Agriculture, Cooperative Extension Service, 1971)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1973)

Publication / the Herbarium, Department of Biological Sciences, University of California, Santa Barbara - University of California, Santa Barbara. (the Herbarium, 1986)

Publications in botany - National Museum of Natural Sciences (Canada) (The Museum, 1977)

Publications - Puget Sound Biological Station - Puget Sound Biological Station. (Puget Sound Biological Station, University of Washington, 1918)

Puissance du Canada : les forêts du Canada et leurs produits - Small, H. Beaumont (Henry Beaumont), 1832 -1919 ([publisher not identified], 1885)

Putney's 1957 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1957)

Putney's 1958 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1958)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1981)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1985)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1876)

Quarterly report - Montana Fish; Game Commission. Wildlife Restoration Division. (The Division, 1955)

Queensland Agricultural Journal - Queensland. Department of Agriculture; Stock. (Queensland Dept. of Primary Industries, 1927)

Ramaria of the Pacific Northwestern United States - Exeter, Ronald L., (U.S. Department of the Interior, Bureau of Land Management, Salem District, 2006)

Range plant community types and carrying capacity for the montane subregion : fourth approximation - Willoughby, Michael, 1959 - (Alberta Environment, Lands and Forest Services, 2001)

Range plant community types and carrying capacity for the montane subregion : fifth approximation - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands Division, 2003)