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Please read BHL's Acknowledgment of Harmful Content
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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  
  2. By: Beard, Raimon L. (Raimon Lewis) - Walton, Gerald S.
    Publication info: New Haven, Connecticut Agricultural Experiment Station, 1971
    Holding Institution: University of Connecticut Libraries
    Subjects: Mycotoxins  Natural pesticides  
  3. By: United States. Agricultural Research Service. - United States. Entomology Research Division.
    Publication info: [Washington, D.C.], Agricultural Research Service, United States Department of Agriculture, 1963
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Biological control  Insect pests  Natural pesticides