Key to the native perennial grasses, midwest region east of the Great Plains - Hitchcock, A. S. (Albert Spear), 1865 -1935 (U.S. Dept. of Agriculture, Soil Conservation Service, 1968)

Key to the Rocky Mountain flora. Colorado, Utah, Wyoming, Idaho, Montana, Saskatchewan, Alberta, and parts of Nebraska, South Dakota, North Dakota, and British Columbia - Rydberg, Per Axel, 1860 -1931 (1919)

Key to the system of Victorian plants (Government Printer, 1885)

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Kootenay Plains Ecological Reserve management plan - Alberta. Alberta Environmental Protection. (Alberta Environmental Protection, 1996)

la han zhong zi zhi wu ming chen - Zhongguo ke xue yuan bian yi chu ban wei yuan hui ming ci shi bian ding (ke xue chu ban she)

la han zhong zi zhi wu ming cheng : di er ban 拉汉种子植物名称:第二版 - ke xue yuan bian yi chu ban wei yuan hui 科学院编译出版委员 会 (ke xue chu ban she 科学出版社, 1974)

Lake Maxinkuckee : a physical and biological survey - Evermann, Barton Warren, 1853 -1932 (Dept. of Conservation, 1920)

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Land management planning : goal programming for land management planning basics and procedures - United States. Forest Service. (1977)

Larva collecting and breeding; a handbook to the larvae of the British macro-lepidoptera and their food plants; both in nature and in confinement, with authorities - St. John, John Seymour. (W. Wesley, and to be had of the author, 1890)

Larva collecting and breeding : a handbook to the larvae of the British Macro-Lepidoptera and their food plants : both in nature and in confinement, with authorities - St. John, John Seymour. (W. Wesley, 1890)

Larvae of owlet moths (Noctuidae) : biology, morphology, and classification - Marzheevskaia, O. I. (Smithsonian Institution Libraries and National Science Foundation, 1988)

Late Quaternary vegetation history of the Yellowstone Lake Basin, Wyoming - Geological Survey (U.S.) (U.S. Dept. of the Interior, Geological Survey : for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1976)

Leaf-mining insects - Needham, James G. (James George), 1868 -1957 (The Williams & Wilkins company, 1928)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1932)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1941)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1947)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1950)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1953)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1956)

Leaflets of western botany - Eastwood, Alice, 1859 -1953 ([J. T. Howell], 1959)

Lectures on plant pathology and physiology in relation to man; a series of lectures given at the Mayo Foundation and the universities of Minnesota, Iowa, Wisconsin, the Des Moines Academy of Medicine, Iowa, and the Iowa State College, 1926-1927 (W. B. Saunders Co, 1928)

Legislation against weeds - Dewey, Lyster H. (Lyster Hoxie), 1865 -1944 (U.S. Dept. of Agriculture, Division of Botany, 1896)

Legumes and grasses in dryland cropping systems in the northern and central Great Plains : a review of the literature - Brown, P. L. (Paul L.) (Agricultural Research Service, U.S. Dept. of Agriculture, 1964)

The Lepidopterists' news : the monthly newsletter of the Lepidopterists' Society - Lepidopterists' Society (Lepidopterists' Society, 1947)

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The Lepidopterists' Society, commemorative volume, 1945-1973 - Clench, Harry K. (The Society, 1945)

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liao ning sheng zhang gu tai gu sha zao lin shi yan - Zhongguo ke xue yuan. Lin ye tu rang yan jiu suo. 中国科学院. 林业土壤研究所 (ke xue chu ban she, 1957)

The life history of timothy - Evans, Morgan W. (Morgan William), 1879 - (U.S. Dept. of Agriculture, 1927)

Lilly's seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Chas. H. Lilly Co, 1937)

lin ye ming ci - Zhongguo ke xue yuan bian yi ju (zhong guo ke xue yuan, 1954)

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List of intercepted plant pests - United States. Agricultural Research Service. (U.S. G.P.O.], 1952)

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A list of plants growing without cultivation in Franklin, Hampshire and Hampden counties, Massachusetts - Stone, George E. (George Edward), 1860 -1941 (Carpenter & Morehouse, 1913)

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A list of the aphids of Oregon (Homoptera: Aphididae) - Leonard, Mortimer Demarest, 1890 - (Agricultural Research Service, 1974)

A List of the insects of New York : with a list of the spiders and certain other allied groups - Leonard, Mortimer Demarest, 1890 - (Cornell University, 1928)

Liste annotée des plantes à fleurs et des fougères de la Pointe Pelé e, Ont., et des régions avoisinantes - Geological Survey of Canada (Impr. du gouvernement, 1917)

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Livestock husbandry on range and pasture - Sampson, Arthur W. (Arthur William), 1884 -1967 (J. Wiley, 1928)

The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling News Litho. Co, 1913)

The London catalogue of British plants : containing the British Phænogamia, Filices, Equisetaceæ, Lycopodiaceæ, Selaginellaceæ, Marsileaceæ, Salviniaceæ and Charophyta. Adapted for marking desiderata in exchanges of specimens; for an index catalogue to British herbaria; for indicating the species of local districts; and for a guide to collectors by showing the comparative rarity or frequency of the several species - Fraser, H. (George Bell & Sons, 1925)

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Loop-frequency as related to plant cover, herbage production, and plant density - Driscoll, Richard S., 1928 - (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1972)

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Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1943)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1947)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1949)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1950)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1963)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1965)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1968)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 1969)