Outbreaks of the western spruce budworm in the American northern Rocky Mountain area from 1922 through 1971
By: Philip C. Johnson, and Robert E. Denton.
Contributors: Denton, Robert E., joint author.
Series: USDA Forest Service general technical report INT ; 20; USDA Forest Service general technical report INT ;; 20.
Publisher: Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1975
Place of publication: Ogden, Utah
Language: eng
Number of pages: 144
Subjects: Western spruce budworm -- Rocky Mountains Region.
Other titles: Outbreaks of the western spruce budworm ...
Notes: Bibliography: p. 60-85.