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  1. By: Spofford, Walter R
    Type: Article
    In: The Wilson bulletin
    Volume: 61
    Issue: 2
    Date: 1949
    Page Range: 86--90
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Lee, David Stephen, - Spofford, Walter R
    Type: Article
    In: The Wilson bulletin
    Volume: 102
    Issue: 4
    Date: 1990
    Page Range: 693--698
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-