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Rocky Mountain juniper woodlands : year-round avian habitat - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1991)

The rod and gun and American sportsman ([Rod and Gun Association, 1876)

The romance of bird life : being an account of the education, courtship, sport and play, journeys, fishing, fighting, piracy, domestic and social habits, instinct, strange friendships and other interesting aspects of the life of birds - Lea, John. (Seeley & Co, 1909)

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Rough notes and memoranda relating to the natural history of the Bermudas - Hurdis, John L. (R.H. Porter, 1897)

The rough-winged swallow, Stelgidopteryx ruficollis (Vieillot); a study based on its breeding biology in Michigan - Lunk, William A (Nuttall Ornithological Club, 1962)

Sage notes : Idaho Native Plant Society newsletter - Idaho Native Plant Society. (Idaho Native Plant Society, Pahove Chapter, 1998)

San Francisco Zoological Gardens master plan : draft environmental impact report - San Francisco (Calif.). Planning Dept. (Planning Dept, 1997)

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Sand dunes and salt marshes - Townsend, Charles Wendell, 1859 -1934 (D. Estes & company, 1913)

Sand dunes and salt marshes - Townsend, Charles Wendell, 1859 -1934 (Page Company Publishers, 1913)

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Scottish birds - Scottish Ornithologists' Club (Scottish Ornithologists' Club, 1993)

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The Scottish naturalist (T. Buncle & Co. [etc.], 1948)

Selected vertebrate endangered species of the seacoast of the United States - Biological Services Program (U.S.) (The Service : [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1980)

Selection and use of snags by secondary cavity-nesting birds of the ponderosa pine forest - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1980)

Seventy years of vegetative change in a managed ponderosa pine forest in Western Montana : implications for resource management - Gruell, George E. (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1982)

Sex and internal secretions - Allen, Edgar, 1892 -1943 (Williams & Wilkins, 1961)

Sex ratios in pigeons, together with observations on the laying, incubation and hatching of eggs - Cole, Leon J. (Leon Jacob), 1877 -1948 (Agricultural Experiment Station of the Rhode Island State College, 1915)

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sheng tai xue yuan li he ye wai sheng wu xue - Smith, Robert Leo 1925 - (ke xue chu ban she, 1988)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1895)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin and Co, 1902)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton Mifflin and company, 1914)

Silviculture of southwestern ponderosa pine : the status of our knowledge - Schubert, Gilbert Herman, 1915 - (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1974)

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A sketch of the natural history (vertebrates) of the British Islands : With a concise bibliography of popular works relating to the British fauna, and a list of field clubs and natural history societies in the United Kingdom - Aflalo, Frederick G. (Frederick George), 1870 -1918 (W. Blackwood and Son, 1898)

A sketch of the natural history (vertebrates) of the British Islands. With a concise bibliography of popular works relating to the British fauna, and a list of field clubs and natural history societies in the United Kingdom - Aflalo, Frederick G. (Frederick George), 1870 -1918 (W. Blackwood and Son, 1898)

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Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1880)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1881)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1882)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1904)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1921)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1961)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1962)

Snag habitat management : proceedings of the symposium, June 7-9, 1983, Northern Arizona University, Flagstaff - Davis, Jerry W. (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1983)

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Societatum litterae (R. Friedländer, 1890)

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Some common birds useful to the farmer - U.S. Fish; Wildlife Service (U.S. Govt. print. off, 1942)

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Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1977)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1979)

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The standard natural history - Kingsley, J. S. (John Sterling), 1854 -1929 (S.E. Cassino and company, 1885)

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Strolls by starlight and sunshine - Gibson, W. Hamilton (William Hamilton), 1850 -1896 (Harper & Brothers, 1891)

A study of the incubation periods of birds; what determines their lengths - Bergtold, W. H. (William Harry), 1865 -1956 (The Kendrick-Bellamy co, 1917)

Summer birds of Greene County, Pennsylvania - Jacobs, Joseph Warren, 1868 -1947 (Republican book and job office, 1893)

The summer birds of Hazelton, British Columbia - Taverner, P. A. (Percy Algernon), 1875 -1947 (s.n, 1919)

Summer birds of Prince Edward Island - Dwight, Jonathan, Jr., 1858 -1929 (s.n, 1893)

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The summer birds of the northeast shore of Lake Superior, Ontario - Royal Ontario Museum of Zoology. (Printed by the University of Toronto Press, 1943)

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A survey of natural areas in Tyrrell County, North Carolina : for The North Carolina Natural Heritage Program, Coastal Natural Area Inventory Project - North Carolina. Coastal Energy Impact Program. (North Carolina Coastal Energy Impact Program, Office of Coastal Management, North Carolina Dept. of Natural Resources and Community Development, 1982)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1981)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1983)

Sylvan secrets, in bird-songs and books - Thompson, Maurice, 1844 -1901 (J. B. Alden, 1887)

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