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1
Insects associated with ponderosa pine in the Rocky Mountains and the Southwest /
by Stevens, Robert E., 1928-2020
[Fort Collins, Colo.] : Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1982

Government Document Book
2
Spruce beetles in blowdown /
by Schmid, J. M.
[Fort Collins, Colo.] : USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1981

Government Document Book
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