Insect control in flour mills
By: by E.A. Back
Series: Bulletin / United States Department of Agriculture -- no. 872; Bulletin of the U.S. Department of Agriculture -- no. 872.
Publisher: U.S. Dept. of Agriculture
Published: 1920
Place of publication: Washington, D.C
Language: eng
Number of pages: 40
Subjects: Insect pests; Control; Flour mills; Fumigation
Notes: Caption title.

"November 11, 1920."