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Plants collected on Isle Royale during the summer of 1909 by W.S. Cooper - Cooper, William Skinner, 1884 -1978 (1909)

Plants from the Swauk - Sharples, Stephen Paschall, 1842 -1923 (1913)

Plants in Danger: what do we know? (1986)

Plants observed growing near Hollidaysburg, Pennslvania - Lowrie, Jonathan Roberts, 1823 -1885

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

Plants of James' Bay collected by David Potter - Potter, David, 1894 -1967 (1929)

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 Monroe County, New York, and adjacent territory - Beckwith, Florence. (1896)

The plants of Prince Edward Island - Erskine, D. S. (David Sterling) (Plant Research Institute, Research Branch, Canada Dept. of Agriculture, 1960)

The plants of Prince Edward Island - Erskine, D. S. (David Sterling) (Research Branch, Agriculture Canada, 1985)

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

The plants of Southern New Jersey; with especial reference to the flora of the Pine Barrens and the geographic distribution of the species - Stone, Witmer. 1866 -1939 (1911)

The plants of Southern New Jersey with especial reference to the flora of the pine barrens and the geographic distribution of the species - Stone, Witmer. 1866 -1939 (1911)

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 the U.S. Military Academy, West Point, New York - Barringer, Kerry Alan (Brooklyn Botanic Garden, 1990)

Plants of Yellowstone National Park - McDougall, W. B. (Walter Byron), 1883 - (U.S. Govt. Print. Off, 1936)

The Pliocene Verdi flora of western Nevada - Axelrod, Daniel I. (University of California Press, 1958)

Pocket gopher food habits on two disturbed forest sites in central Arizona - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1984)

Polychlorinated biphenyl hazards to fish, wildlife, and invertebrates : a synoptic review - U.S. Fish; Wildlife Service (The Service, 1986)

The Polyporaceae of Wisconsin - Neuman, Julius John. (The State, 1914)

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Pomona College journal of entomology - Pomona College (Claremont, Calif.). Department of Biology. (Published under the patronage of Ontario-Cucamonga Citrus Association by the Dept. of Biology of Pomona College, 1912)

Pomona College journal of entomology - Pomona College (Claremont, Calif.). Department of Biology. (Published under the patronage of Ontario-Cucamonga Citrus Association by the Dept. of Biology of Pomona College, 1910)

A popular California flora : or, Manual of botany for beginners, with illustrated introductory lessons, especially adapted to the Pacific coast; to which is added an Analytical key to west coast botany - Rattan, Volney, 1840 -1915 (Whitaker & Ray, 1896)

A popular California flora : or, Manual of botany for beginners with illustrated introductory lessons, especially adapted to the Pacific Coast ; to which is added an analytical key to west coast botany, containing brief descriptions of over 1600 species of Pacific Coast plants - Rattan, Volney, 1840 -1915 (Whitaker & Ray, 1896)

A popular California flora : or, manual of botany for beginners ... : to which is added an Analytical key to west coast botany ... - Rattan, Volney, 1840 -1915 (Bancroft, 1892)

A popular California flora, or, Manual of botany for beginners. Containing descriptions of flowering plants growing in central California, and westward to the ocean. With illustrated introductory lessons, especially adapted to the Pacific coast - Rattan, Volney, 1840 -1915 (A.L. Bancroft, 1883)

A popular California flora, or, Manual of botany for beginners. With illustrated introductory lessons, especially adapted to the Pacific Coast. To which is added an Analytical key to west coast botany. Containing brief descriptions of over 1600 species of Pacific Coast plants - Rattan, Volney, 1840 -1915 (The Whitaker & Ray Co, 1896)

A popular California flora, or, Manual of botany for beginners : with illustrated introductory lessons especially adapted to the Pacific coast : to which is added an analytical key to West Coast botany, containing brief descriptions of over 1600 species of Pacific coast plants - Rattan, Volney, 1840 -1915 (Bancroft, 1887)

A popular California flora : or, manual of botany for beginners ... : to which is added an analytical key to West Coast botany ... - Rattan, Volney, 1840 -1915 (Bancroft, 1888)

A popular California flora, or Manual of botany for beginners. Containing descriptions of flowering plants growing in central California, and westward to the ocean. With illustrated introductory lessons, especially adapted to the Pacific coast - Rattan, Volney, 1840 -1915 (A.L. Bancroft, 1882)

A popular California flora, or, Manual of botany for beginners. Containing descriptions of flowering plants growing in central California, and westward to the ocean - Rattan, Volney, 1840 -1915 (A.L. Bancroft and Company, 1885)

Popular gardening and fruit growing; An illustrated periodical devoted to horticulture in all its branches (Popular gardening publishing company, 1889)

Popular gardening and fruit growing; An illustrated periodical devoted to horticulture in all its branches (Popular gardening publishing company, 1890)

Popular herbal remedies : a handbook - Potter & Clarke. ([Potter & Clarke], 1900)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1889)

Population dynamics and ecology of subarctic shrews - Doyle, David M. (University of Alberta, Dept. of Zoology, 1979)

Population dynamics, denning and movements of striped skunks in central Alberta - Bjorge, Ronald R. (1977)

Population dynamics of island populations of subarctic Clethrionomys rutilus and Peromyscus maniculatus - Burns, Gordon R. (Gordon Russell), 1954 - (University of Alberta, Dept. of Zoology, 1980)

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Population response of the northern red-backed vole (Clethrionomys rutilus) to differentially cut white spruce forest - Pacific Northwest Forest; Range Experiment Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1980)

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Postglacial vegetational changes along an elevational gradient in the Adirondack Mountains (New York) : a study of plant macrofossils - Biological Survey (N.Y.) (University of the State of New York, State Education Dept., New York State Museum, Biological Survey, 1989)

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)

Potential for producing ponderosa pine plywood in the Black Hills - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S.D.A, 1981)

Potter's cyclopaedia of botanical drugs and preparations - Holmes, E. M. (Edward Morell), 1843 -1930 (Potter & Clarke, 1915)

Potter's cyclopedia of botanical drugs and preparations - Wren, R. C. (Richard Cranfield), 1864 -1931 (Potter & Clarke, 1900)

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Practical arboriculture; how forests influence climate, control the winds, prevent floods, sustain national prosperity, a text book for railway engineers, manufacturers, lumbermen and farmers - Brown, John Pinkney, 1842 -1915 ([Hennebery Press], 1906)

Practical arboriculture; how forests influence climate, control the winds, prevent floods, sustain national prosperity; a text book for railway engineers, manufacturers, lumbermen and farmers. How, where and what to plant for the rapid production of lumber, cross-ties, telegraph poles and other timbers, with original photographs by the author - Brown, John Pinkney, 1842 -1915 ([The Henneberry press, Chicago], 1906)

Practical forestry - Mattoon, Wilbur R. (Wilbur Reed), 1875 -1941 (Connecticut Forest and Park Association, 1939)

Practical forestry for beginners in forestry, agricultural students, woodland owners, and others desiring a general knowledge of the nature of the art - Gifford, John C. (John Clayton), 1870 -1949 (D. Appleton and company, 1902)

Practical forestry for beginners in forestry, agricultural students, woodland owners, and others desiring a general knowledge of the nature of the art - Gifford, John C. (John Clayton), 1870 -1949 (D. Appleton, 1902)

Practical forestry in the Adirondacks - Graves, Henry S. (Henry Solon), 1871 -1951 (Dept. of Agriculture, Forestry Division, 1899)

Practical forestry. A treatise on the propagation, planting, and cultivation, with a description, and the botanical and popular names of all the indigenous trees of the United States - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd company, 1884)

A practical guide to garden plants, containing descriptions of the hardiest and most beautiful annuals and biennials, hardy herbaceous and bulbous perennials, hardy water and bog plants, flowering and ornamental trees and shrubs, conifers; hardy ferns; hardy bamboos and other ornamental grasses. Also the best kinds of fruits and vegetables that may be grown in the open air in the British Isles with full and practical instruction as to culture and propagation - Weathers, John, 1867 -1928 (Longmans, Green, 1901)

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)

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Predicting the durability of forest recreation sites in northern Utah : preliminary results - Intermountain Forest; Range Experiment Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest & Range Experiment Station, 1970)

Predicting the effect of fire on large-scale vegetation patterns in North America - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1996)

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

Preliminary catalogue of the flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (1892)

Preliminary classification for the coniferous forest and woodland series of Arizona and New Mexico - Schubert, Gilbert Herman, 1915 - (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1979)

Preliminary classification of forest vegetation of the Kenai Peninsula, Alaska - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990)

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