Biological control of insect pests in the continental United States /

Clausen, Curtis P. 1893-

Biological control of insect pests in the continental United States / by C.P. Clausen. - Washington : U.S. Dept. of Agriculture, 1956. - vi, 151 p. : maps ; 23 cm. - Technical bulletin / United States Department of Agriculture ; no. 1139 . - Technical bulletin (United States. Department of Agriculture) ; no. 1139. .

Includes index.

Literature cited: p. 135-143.

agr56000193


Insect pests--Biological control--United States.

S21 / .A72 no. 1139

1 / Ag84Te no.1139

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