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Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), Pike National Forest, 1986 - Lessard, Gene D. (Timber, Forest Pest, and Cooperative Forestry Management, Rocky Mountain Region, USDA Forest Service, 1986)

The douglas-fir/white spirea habitat type in central Idaho : succession and management - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1994)

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Draft environmental impact statement : Vail category III ski area development - United States. Army. Corps of Engineers. ([U.S. Dept. of Agriculture, Forest Service, White River National Forest, Holy Cross Ranger District, Rocky Mountain Region], 1995)

Draft programmatic environmental impact statement : the grizzly bear in northwestern Montana - Dood, Arnold R. (Montana Dept. of Fish, Wildlife and Parks, 1985)

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Ecological genetics of Pinus contorta in the Upper Snake River Basin of eastern Idaho and Wyoming - Intermountain Research Station (Ogden, Utah) (USDA Forest Service, Intermountain Research Station, 1986)

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Ecological investigations upon the germination and early growth of forest trees - Boerker, Richard H. D. (Richard Hans Douai), 1887 -1966 (1916)

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An ecological study of wildlife and fisheries in the Pembina and Sturgeon River Basins - Alberta. Dept. of Environment. Water Resources Division, (Government of Alberta, 1971)

Ecological types of the upper Gunnison Basin : review draft - Johnston, Barry C. (U.S. Department of Agriculture, Forest Service, Grand Mesa-Uncompahgre-Gunnison National Forests, 1997)

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Ecology and conservation of wolves in a changing world - Carbyn, Ludwig N. 1941 - (Canadian Circumpolar Institute, University of Alberta, 1995)

Ecology and management of larix forests : a look ahead : proceedings of an international symposium, Whitefish, Montana, U.S.A. October 5-9, 1992 - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1995)

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Ecology of the podocarpaceae in tropical forests - Cernusak, Lucas A. (Smithsonian Institution Scholarly Press, 2011)

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The effect of cattle and big game grazing on a ponderosa pine plantation - Pacific Northwest Forest; Range Experiment Station (Portland, Or.) (Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1971)

The effect of fire disturbance level on plant re-establishement in Elk Island National Park, Alberta - University of Alberta. (University of Alberta, 1981)

Effect of grazing upon western yellow pine reproduction in central Idaho - Sparhawk, William N. (William Norwood), 1888 - (U.S. Dept. of Agriculture, 1918)

Effect of jellyrolling and acclimatization on survival and height growth of conifer seedlings - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986)

Effect of kind and number of measured tree heights on lodgepole pine site-quality estimates - Pacific Northwest Forest; Range Experiment Station (Portland, Or.) (Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1966)