Bark beetles of the genus Hylastes erichson in North America
By: by M.W. Blackman.
Series: Miscellaneous publication / United States Department of Agriculture -- no. 417; Miscellaneous publication (United States. Dept. of Agriculture) -- no. 417.
Publisher: U.S. Dept. of Agriculture
Published: 1941
Place of publication: Washington, D.C
Language: eng
Number of pages: 27
Subjects: Hylastes.; Conifers -- Diseases and pests -- United States.; Bark beetles -- United States.
Notes: Caption title.

"March 1941."

Includes index.