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  1. By: Kroodsma, Roger L
    Type: Article
    In: The Wilson bulletin
    Volume: 96
    Issue: 3
    Date: 1984
    Page Range: 426--436
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Kroodsma, Roger L
    Type: Article
    In: The Wilson bulletin
    Volume: 86
    Issue: 3
    Date: 1974
    Page Range: 230--236
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-