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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Skinner, Henry, - Williams, R. C.
    Type: Article
    In: Transactions of the American Entomological Society
    Volume: 48
    Date: 1922
    Page Range: 283--306
    Publication Info: Philadelphia, The Society at the Academy of Natural Sciences, 1890-
  2. By: Skinner, Henry, - Williams, R. C.
    Type: Article
    In: Transactions of the American Entomological Society
    Volume: 48
    Date: 1922
    Page Range: 109--127
    Publication Info: Philadelphia, The Society at the Academy of Natural Sciences, 1890-