Wasps wage war on alfalfa weevils
Series: Picture story -- 230; Picture story (United States. Department of Agriculture) -- no. 230.
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service
Published: 1970
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Alfalfa weevil; Biological control; Wasps
Notes: Cover  title.

"November 1970."