The western grass-stem sawfly
By: by C.N. Ainslie
Series: Bulletin / United States Department of Agriculture -- no. 841; Bulletin of the U.S. Department of Agriculture -- no. 841.
Publisher: U.S. Dept. of Agriculture
Published: 1920
Place of publication: Washington, D.C
Language: eng
Number of pages: 27
Subjects: Western grass-stem sawfly
Other titles: Western grass stem sawfly.
Notes: Caption title.

"May 7, 1920."

"Professional paper."