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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Blackman, M. W. (Maulsby Willett), - Stage, Harry Hutchinson,
    Publication info: Syracuse, The University, [1918]
    Holding Institution: Library of Congress
  2. By: United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations. - Stage, Harry Hutchinson,
    Publication info: Washington?, 1935?
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library