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  1. By: Mengel, Robert M.
    Type: Article
    In: The Wilson bulletin
    Volume: 65
    Issue: 1
    Date: 1953
    Page Range: 54--54
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Mengel, Robert M.
    Type: Article
    In: The Wilson bulletin
    Volume: 94
    Issue: 4
    Date: 1982
    Page Range: 604--604
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-