Bumble bees of Western America (Hymenoptera: Apoidea)
By: W.P. Stephen.
Series: Technical bulletin -- 40.; Technical bulletin (Oregon State College. Agricultural Experiment Station) -- 40.
Publisher: Agricultural Experiment Station, Oregon State College
Published: 1957
Place of publication: Corvallis
Language: eng
Number of pages: 163
Subjects: Bombus -- West (U.S.); Bombus -- British Columbia.; Bumblebees -- West (U.S.); Bumblebees -- British Columbia.
Notes: Cover title.

"November 1957."

Includes bibliographical references (p. 162) and index.