Biological control of insect pests in the continental United States
Clausen, C.P.
Biological control of insect pests in the continental United States
- Washington: U.S. Department of Agriculture, 1956
- 144p., 22cm
- Technical bulletin (United States. Department of Agriculture); 1139 .
Index: pp 144-47
Insect pests-Biological control-United States Insect pests-Biological control