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Science in Alaska; selected papers of the Alaskan Science Conference of the National Academy of Sciences - National Research Council, Washington, Nov.9-11, 1950 - Collins, Henry B. (Henry Bascom), 1899 -1987 (Arctic Institute of North America, 1952)

Science studies, v.1, no. 1-3 - Montana Agricultural Experiment Station. (1905)

The Scientific basis for conserving forest carnivores : American marten, fisher, lynx, and wolverine in the western United States - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1994)

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Scientific papers of Asa Gray - Gray, Asa, 1810 -1888 (Houghton, 1889)

Scientific publications of the Cleveland Museum of Natural History - Cleveland Museum of Natural History (The Museum, 1928)

A screening procedure to evaluate air pollution effects in Region 1 wilderness areas, 1991 - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1997)

Seasonal biology of Anopheles, Culex and Culiseta in central Alberta (Diptera: Culicidae) - Hudson, James Edward. (University of Alberta, Dept. of Entomology, 1977)

Seeding southern Idaho rangelands - Intermountain Forest; Range Experiment Station (Ogden, Utah) (Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1964)

Select extra-tropical plants : readily eligible for industrial culture or naturalization, with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (J. Ferres, 1885)

Select extra-tropical plants, readily eligible for industrial culture or naturalisation, with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (T. Richards, government printer, 1881)

Select extra-tropical plants readily eligible for industrial culture or naturalisation, with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (Off. of the superintendent of government printing, 1880)

Select extra-tropical plants readily eligible for industrial culture or naturalisation, with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (Off. of the Superintendent of Government Printing, 1880)

Select extra-tropical plants readily eligible for industrial culture or naturalization, with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (G.S. Davis, 1884)

Select extra-tropical plants readily eligible for industrial culture or naturalisation with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (C. Troedel and Co, 1891)

Select extra-tropical plants readily eligible for industrial culture or naturalisation with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (1895)

Select extra-tropical plants readily eligible for Victorian industrial culture or naturalisation with indications of their native countries and some of their uses - Mueller, Ferdinand von, 1825 -1896 (J. Ferres, 1885)

Select plants readily eligible for industrial culture or naturalisation in Victoria - Mueller, Ferdinand von, 1825 -1896 (Printed for the government of Victoria by McCarron, Bird & co, 1876)

Selected western flora, Manitoba, Saskatchewan, Alberta - Hales, B. J. (Benjamin Jones), 1868 -1945 (the Macmillan Co. of Canada, 1915)

Sensitive plant species inventory in the Centennial Valley, Beaverhead County, Montana - United States. Bureau of Land Management. (Montana Natural Heritage Program, 1993)

Sensitive plant species survey, Ashland District, Custer National Forest, Powder River and Rosebud Counties, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1996)

Sensitive plant species survey, Garfield and McCone Counties, Montana - United States. Bureau of Land Management. (Montana Natural Heritage Program, 1994)

Sensitive plant survey in the Horse Prairie Creek drainage, Beaverhead County, Montana, Butte District, Bureau of Land Management - United States. Bureau of Land Management. (Montana Natural Heritage Program, 1995)

Sensitive plant survey in the Sioux District, Custer National Forest, Carter County, Montana, and Harding County, South Dakota - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1995)

Sensitive plant survey in the Sweetgrass Hills, Liberty and Toole Counties, Montana - United States. Bureau of Land Management. (Montana Natural Heritage Program, 1994)

Sensitive plant survey of the Tendoy Mountains, in the Beaverhead National Forest, Beaverhead County, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1995)

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Sensitive plant surveys in the Big Belt and Elkhorn Mountains, U.S.D.A. Forest Service, Region 1, Helena National Forest, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1993)

Sensitive plant surveys in the Bull River and adjacent drainages, U.S.D.A. Forest Service, Region 1, Kootenai National Forest, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1990)

Sensitive plant surveys in the Gallatin National Forest, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1994)

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Seventh report : National Steering Committee for Management of Western Defoliators - United States. Forest Pest Management. (USDA Forest Service, Forest Pest Management, 1994)

sheng tai hua xue qian yan - kong chui hua lou yong gen (gao deng jiao yu chu ban she, 2010)

sheng tai xue ci dian - zhao tian zhen yi (tu jing zhuang yi lang, 1974)

sheng wu quan de di yi xing sheng chan li - Lieth, Herbert. (ke xue chu ban she, 1985)

Shoshone National Forest, Wyoming - United States. Forest Service. (U.S. Govt. Print. Off, 1941)

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SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1965)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1975)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1990)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1994)

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Significance and disturbance study of Devonshire Beach-Lesser Slave Lake Provincial Park - Alberta. Parks; Protected Areas Division. (The Company, 2004)

Significant ecological features inventory of the Lesser Slave Lake integrated resource planning area - Bentz, Jerry A. (GEOWEST Environmental Consultants Ltd, 1993)

The silva of North America :a description of the trees which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin and company, 1896)

The silva of North America :a description of the trees which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin and company, 1902)

The silva of North America a description of the tree which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1902)

The silva of North America a description of the tree which grow naturally in North America exclusive of Mexico - Sargent, Charles Sprague, 1841 -1927 (Houghton, Mifflin, 1896)

Silvical characteristics of Canadian trees - Toronto (Ont.) Faculty of Forestry (University of Toronto, Foresters' Club, 1915)

Silvical characteristics of Canadian trees (The Club, 1915)

Silvical characteristics of Engelmann spruce - Alexander, Robert R. (USDA, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1984)

Silvical characteristics of subalpine fir - Alexander, Robert R. (1984)

Silvicultural management of black spruce in Minnesota - Le Barron, Russell K. (U.S. Dept. of Agriculture, 1948)

Silvicultural systems and cutting methods for old-growth spruce-fir forests in the Central and Southern Rocky Mountains - Alexander, Robert R. (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986)

Silvicultural systems and cutting methods for ponderosa pine forests in the Front Range of the Central Rocky Mountains - Alexander, Robert R. (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986)

Silvicultural systems, cutting methods, and cultural practices for Black Hills ponderosa pine - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1987)

Silviculture of central and southern Rocky Mountain forests : a summary of the status of our knowledge by timber types - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1974)

Silviculture of Ponderosa pine in the Black Hills : the status of our knowledge - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1974)

Silviculture of southwestern mixed conifers and aspen : the status of our knowledge - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1974)

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)

Silviculture of subalpine forests in the central and southern Rocky mountains : the status of our knowledge - Alexander, Robert R. (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1974)

Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872 - Geological; Geographical Survey of the Territories (U.S.) (G.P.O, 1873)

Sketch of the North-West of America (Printed by J. Lovell, 1870)

Sketch of the North-West of America (s.n.], 1870)

Sketches of the physical geography and geology of Nebraska - Aughey, Samuel, 1831 -1912 (Daily Republican Book and Job Office, 1880)

Skogsvårdsföreningens tidskrift - Föreningen för skogsvård (Sweden) (Centraltryckeriet, 1921)

Smithsonian contributions to knowledge - Smithsonian Institution (Smithsonian Institution, 1895)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1923)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1933)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1951)

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

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)

Societatum litterae (R. Friedländer, 1893)

Soil and vegetation inventory of Wagner Natural Area, Alberta - Alberta. Alberta Environment. (Geowest Environmental Consultants Ltd, 2000)

Some morphological and physiological effects of (2-chloroethyl) trimethylammonium chloride (CCC) on certain species of the gramineae - University of Alberta. Dept. of Plant Science. (1964)

Some new and important plant disease occurrences and developments in the United States in 1955 - United States. Plant Disease Epidemics; Identification Section. (Plant Disease Epidemics and Identification Section, Agricultural Research Service, United States Department of Agriculture, 1956)

Some new and important plant disease occurrences and developments in the United States in 1957 - Nance, Nellie W. (Crops Research Division, Agricultural Research Service, United States Department of Agriculture, 1958)

Some new and important plant disease occurrences and developments in the United States in 1952 - United States. Plant Disease Survey. (Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture, 1953)

Some new and important plant disease occurrences and developments in the United States in 1956 - United States. Plant Disease Epidemics; Identification Section. (Plant Disease Epidemics and Identification Section, Agricultural Research Service, United States Department of Agriculture, 1957)

Some plant galls of Illinois - Winterringer, Glen Spelman, 1906 - (Dept. of Registration and Education, 1961)

Some relationships between moose and willow in the Fort Providence, N.W.T. area - Penner, David F. (University of Alberta, Dept. of Plant Science, 1978)

Some unusual natural areas in Illinois and a few of their plants - Evers, Robert A. (Robert August), 1912 - (1963)

Songbird ecology in southwestern Ponderosa pine forests : a literature review - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1997)

Sources of the Ohio flora - Duvel, J. W. T. (1899)

South Saskatchewan River Basin riparian health overview, including. Part 1, Red Deer, Bow and South Saskatchewan Rivers and - Alberta. Alberta Environment. (The Society, 2005)