Insect parasites and predators of insect pests
Clausen, C.P.
Insect parasites and predators of insect pests - Washington 1935 - 1-22 p. - Insects, Pests United States Department of Agriculture. Circular No. 346 .
Insect parasites and predators of insect pests - Washington 1935 - 1-22 p. - Insects, Pests United States Department of Agriculture. Circular No. 346 .