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  1. By: Schwartz, Charles W - Schwartz, Elizabeth Reeder
    Type: Article
    In: The Wilson bulletin
    Volume: 63
    Issue: 3
    Date: 1951
    Page Range: 149--156
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Schwartz, Charles W - Schwartz, Elizabeth Reeder
    Type: Article
    In: The Wilson bulletin
    Volume: 65
    Issue: 1
    Date: 1953
    Page Range: 18--25
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-