Two destructive defoliators of lodgepole pine in the Yellowstone National Park
By: by H.E. Burke
Series: Circular / United States Department of Agriculture -- no. 224; Circular (United States. Dept. of Agriculture) -- no. 224.
Publisher: U.S. Dept. of Agriculture
Published: 1932
Place of publication: Washington, D.C
Language: eng
Number of pages: 20
Subjects: Lodgepole pine; Neodiprion; Diseases and pests
Notes: Caption title.

Bibliography: p. 19.