Brief information on injury to spruce and fir by the spruce bud-worm
By: A. D. Hopkins
Contributors: United States. Bureau of Entomology; United States. Bureau of Entomology and Plant Quarantine
Series: Forest entomology brief -- 24; Forest entomology brief -- 24.
Publisher: U.S. Department of Agriculture, Bureau of Entomology
Published: 1920
Place of publication: Washington, D.C
Language: eng
Subjects: Spruce budworm; Control
Other titles: Injury to spruce and fir by the spruce bud-worm
Notes: "July 30, 1920."

Handwritten next to date: "[Rev.]"