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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Betts, Norman De Witt,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Betts, Norman De Witt, - Heim, A. L. (Arthur Lloyd),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Betts, Norman De Witt,
    Type: Article
    In: The Wilson bulletin
    Volume: 28
    Series: new
    Issue: 2
    Date: 1916
    Page Range: 72--73
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-