Insect parasites and predators of insect pests
By: by Curtis P. Clausen
Series: Circular / United States Department of Agriculture -- no. 346; Circular (United States. Dept. of Agriculture) -- no. 346.
Publisher: U.S. Dept. of Agriculture
Published: 1935
Place of publication: Washington, D.C
Language: eng
Number of pages: 22
Subjects: Insect pests; Biological control
Notes: Caption title.

"Contribution from Bureau of Entomology and Plant Quarantine."