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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ackerman, A. J. (Arthur John),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1923
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Ackerman, A. J. (Arthur John),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1919
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Ackerman, A. J. (Arthur John),
    Type: Article
    In: Journal of the New York Entomological Society
    Volume: 24
    Date: 1916
    Page Range: 196--232
    Publication Info: Lawrence, Kan Allen Press [etc.]