Estimating defoliation of Douglas-fir and white fir by the western budworm / M.E. McKnight.
Contributors: Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Series: Research note RM -- 144.
Publisher: Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1969
Place of publication: Fort Collins, Colo
Language: eng
Subjects: Western spruce budworm; Douglas fir -- Diseases and pests; Douglas fir -- Wounds and injuries; Abies concolor -- Diseases and pests; Abies concolor -- Wounds and injuries
Notes: Caption title.

Includes bibliographical references.