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  1. By: Foster, Mercedes S
    Type: Article
    In: The Wilson bulletin
    Volume: 88
    Issue: 3
    Date: 1976
    Page Range: 400--420
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Foster, Mercedes S - Johnson, Ned K
    Type: Article
    In: The Wilson bulletin
    Volume: 86
    Issue: 1
    Date: 1974
    Page Range: 58--63
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-