A field key to the adult hymenopterous parasites of the spruce budworm in Minnesota
By: [Louis F. Wilson, James L. Bean]
Contributors: Bean, James L.; Lake States Forest Experiment Station (Saint Paul, Minn.)
Series: Research note LS / Lake States Forest Experiment Station -- 53; Research note LS -- 53.
Publisher: Lake States Forest Experiment Station, U.S. Dept. of Agriculture
Published: 1964
Place of publication: St. Paul, Minn
Language: eng
Subjects: Spruce budworm; Identification; Parasites; Hymenoptera
Notes: Caption title.

"October 1964"--P. [4].