Key to large lepidopterous larvae on new foliage of Douglas-fir and true firs
By: V.M. Carolin, Jr., and Robert E. Stevens
Contributors: Stevens, Robert E., 1928-; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Series: Research note RM -- 401
Publisher: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station
Published: 1981
Place of publication: Fort Collins, Colo
Language: eng
Subjects: Caterpillars -- Identification; Douglas fir -- Diseases and pests
Notes: Caption title

"Canusa, Canada, United States Spruce Budworm Program"--P. 4

"May 1981."

Bibliography: p. 4