Biological control of pests by mites :
proceedings of a conference held April 5-7, 1982 at the University of California, Berkeley /
jointly sponsored by the University of California, Berkeley, [and] APHIS-PPQ, U.S.D.A., and Agricultural Research Service, U.S.D.A. ; edited by Marjorie A. Hoy, Gary L. Cunningham, and Lloyd Knutson.

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