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  1. By: Davis, Tristan J. - O'neill, John P
    Type: Article
    In: The Wilson bulletin
    Volume: 98
    Issue: 3
    Date: 1986
    Page Range: 337--352
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Bates, John M. (John Mark), - Parker, Theodore A. - Capparella, Angelo P. (Angelo Paul), - Davis, Tristan J.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 112
    Date: 1992
    Page Range: 86--98
    Publication Info: London, British Ornithologists' Club, 1893-