Bird exclosures for branches and whole trees
By: prepared by United States Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station ; Robert W. Campbell ... [et al.].
Contributors: Campbell, Robert W.; Pacific Northwest Forest and Range Experiment Station (Portland, Or.); Canada/United States Spruce Budworms Program.
Series: General technical report PNW -- 125.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Published: 1981
Place of publication: [Portland, Or.]
Language: eng
Number of pages: 10
Subjects: Birdcages
Notes: "April 1981."

"Canusa, Canada/United States Spruce Budworms Program."

Bibliography: p. 10.