Biological control of insect pests in the continental United States / by C.P. Clausen.

By: Material type: TextTextSeries: Technical bulletin (United States. Department of Agriculture) ; no. 1139.Publication details: Washington : U.S. Dept. of Agriculture, 1956.Description: vi, 151 p. : maps ; 23 cmSubject(s): LOC classification:
  • S21 .A72 no. 1139
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Literature cited: p. 135-143.

Includes index.

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