Ecological studies on the potato psyllid as a pest of potatoes /
by R.L. Wallis.
APA Citation
Wallis, R. L. (Robert L.). (1955). Ecological studies on the potato psyllid as a pest of potatoes. Washington: U.S. Dept. of Agriculture.
MLA Citation
Wallis, R. L. (Robert L.), 1902-. Ecological Studies On the Potato Psyllid As a Pest of Potatoes. Washington: U.S. Dept. of Agriculture, 1955.
Warning: These citations may not always be complete (especially for serials).