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  1. By: Williams, George G
    Type: Article
    In: The Wilson bulletin
    Volume: 63
    Issue: 1
    Date: 1951
    Page Range: 52--54
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Williams, George G
    Type: Article
    In: The Wilson bulletin
    Volume: 62
    Issue: 4
    Date: 1950
    Page Range: 175--182
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-