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

632.960973 / CL/B

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