Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1942)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1956)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1958)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1966)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1967)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1968)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1969)

Plant list : Western United States - Rollins, Reed C. (Reed Clark), 1911 -1998 (1939)

Plant lists : Texas - Lay, Daniel W., (1930)

Plant species of concern and plant associations of Powder River county, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2002)

Plant species of special concern and plant associations of Sheridan County, Montana - Heidel, Bonnie L. (Montana Natural Heritage Program, 2000)

Plant succession in relation to range management - Sampson, Arthur W. (Arthur William), 1884 -1967 (U.S. Dept. of Agriculture, 1919)

The Plant world - Plant World Association. (Plant World Association [etc.], 1915)

The Plant world - Plant World Association. (Plant World Association [etc.], 1916)

The Plant world - Plant World Association. (Plant World Association [etc.], 1917)

Plantae diaphoricae florae Argentinae, ó, Revista sistemática de las plantas medicinales, alimenticias ó de alguna otra utilidad y de las venenosas, que son indígenas de la República Argentina ó que, originarias de otros países se cultivan ó se crian éspontáneamente en ella - Hieronymus, G. (Georg), 1846 -1921 (G. Kraft, 1882)

Plantae Europeae.Enumeratio systematica et synonymica plantarum phaenerogamicarum in Europa sponte crescentium vel mere inquilinarum - Richter, Karl, 1855 -1891 (W. Engelmann, 1890)

Plantae Lindheimerianae : an enumeration of F. Lindheimer's collection of Texan plants, with remarks and descriptions of new species, etc - Gray, Asa, 1810 -1888 (Printed by Freeman and Bolles, 1907)

Plantae rariores quas in itinere per oras Jonii ac Adriatici Maris et per regiones Samnii ac Aprutii - Gussone, Giovanni, 1787 -1866 (Ex Regia Typographia, 1826)

Plantae Scandinaviae; descriptionibus et figuris analyticis adumbratae - Andersson, N. J. (Nils Johan), 1821 -1880 (Sumptibus Z. Haeggström, 1849)

Plantarum Persiae Australis - Boissier, Edmond, 1810 -1885 ([s.n.], 1845)

Plantarum vascularium genera :secundum ordines naturales digesta eorumque differentiae et affinitates tabulis diagnostacis expositae - Weidmann. (Libraria Weidmannia, 1836)

Plantas nuevas chilenas ... - Philippi, Rodolfo Amando, 1808 -1904 (Impr. Cervantes, 1896)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1988)

Plants of Iowa; a preliminary list of the native and introduced plants of the state, not under cultivation - Greene, Wesley. (Bishard brothers, printers, 1907)

The plants of Michigan; simple keys for the identification of the native seed plants of the state - Gleason, Henry A. (Henry Allan), 1882 -1975 (G. Wahr, 1918)

Plants of Riding Mountain National Park, Manitoba - Canadian Parks Service. (Research Branch, Agriculture Canada, 1988)

Plants of the Seven Devils Mountains of Idaho : an annotated checklist - Intermountain Forest; Range Experiment Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1987)

Plants of west-central Montana : identification and ecology : annotated checklist - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1986)

A pocket synopsis of the families of British flowering plants : (based upon the system of Engler) - Grove, W. B. (William Bywater), 1848 -1938 (University Press, 1915)

A popular flora of Denver, Colorado - Eastwood, Alice, 1859 -1953 (Zoe Publishing Company, 1893)

Populäre Botanik oder gemeinfassliche Anleitung zum Studium der Pflanze und des Pflanzenreiches. Zugleich ein Handbuch zum Bestimmen der Pflanzen auf Excursionen - Schmidlin, Eduard, 1808? -1890 (Krais & Hoffmann, 1857)

Population ecology of mule deer with emphasis on potential impacts of gas and oil development along the east slope of the Rocky Mountains, northcentral Montana - United States. Bureau of Land Management. (The Dept.?, 1982)

The potential and current vegetation of the Sun River Game Range - Montana. Department of Fish, Wildlife,; Parks (Montana Dept. of Fish, Wildlife and Parks, 1980)

Prairie chickens on the Sheyenne National Grasslands : September 18, 1987, Crookston, Minnesota - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1988)

Praterflora. Beschreibung der im K.K. Prater und in der Brigittenau ausserhalb der Gärten wildwachsenden und angebauten Pflanzen - Bayer, Johann Nepomuk, 1802 -1870 (Wilhelm Braumüller, 1869)

Preliminary botanical survey, Tongue River area - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1997)

Preliminary classification of native wheat grass (Agropyron spp.) community types in Alberta - Alberta. Alberta Environment. (Geowest Environmental Consultants Ltd, 2001)

A preliminary classification of plant communities in the central Parkland natural sub-region of Alberta - Alberta. Alberta Sustainable Resource Development. (Geowest Environmental Consultants Ltd, 2002)

A preliminary classification of the plant communities of northeastern Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1991)

A preliminary classification of the Rocky Mountain shrubland communities of Alberta - Alberta. Alberta Environment. (Alberta Environment, 2000)

A preliminary list of the Uredinales of California - Blasdale, Walter Charles, 1871 -1960 (University of California press, 1919)

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

Principal range plants of the central and southern Rocky Mountains : names and symbols - Nickerson, Mona F. (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1976)

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Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1974)

Proceedings and Transactions of the Croydon Microscopical & Natural History Club - Croydon Microscopical; Natural History Club. (1871)

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Proceedings - Dorset Natural History and Archaeological Society - Dorset Natural History; Archaeological Society. (1877)

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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)

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Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1875)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1954)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1956)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1960)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1963)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1965)

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, 1904)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1917)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1935)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1939)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1970)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1976)

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