The spring grain aphis or "green bug" in the Southwest and the possibilities of an outbreak in 1916
By: by. F.M. Webster
Series: Circular / United States, Dept. of Agriculture, Office of the    Secretary -- no. 55; Circular (United States. Dept. of Agriculture. Office of the Secretary) -- no. 55.
Publisher: U.S. Dept. of Agriculture, Office of the Secretary
Published: 1916
Place of publication: Washington, D.C
Language: eng
Subjects: Grain-louse
Notes: Cover title.

February 5, 1916.