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  1. By: Stevenson, Henry M
    Type: Article
    In: The Wilson bulletin
    Volume: 50
    Issue: 1
    Date: 1938
    Page Range: 36--41
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Stevenson, Henry M
    Type: Article
    In: The Wilson bulletin
    Volume: 69
    Issue: 1
    Date: 1957
    Page Range: 39--77
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-