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  1. By: McDonnell, C. C. - Keenan, George Lawrence, - Roark, R. C. (Ruric Creegan)
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1920
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  Biochemistry  biopesticides  bio-pesticides  botanical insecticides  botanical pesticides  insecticidal properties  Insecticides  Internet resource  natural insecticides  Natural pesticides