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  1. By: Thomas, Betsy Trent
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 110
    Date: 1990
    Page Range: 48--51
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Thomas, Betsy Trent
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 113
    Date: 1993
    Page Range: 9--17
    Publication Info: London, British Ornithologists' Club, 1893-
  3. By: Harrington, B A - Leeuwenberg, F J - Resende, S Lara - Mcneil, R - Thomas, Betsy Trent - Grear, Jason S. - Martinez, E F
    Type: Article
    In: The Wilson bulletin
    Volume: 103
    Issue: 4
    Date: 1991
    Page Range: 621--636
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  4. By: Thomas, Betsy Trent - Ingels, Johan
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 115
    Date: 1995
    Page Range: 226--228
    Publication Info: London, British Ornithologists' Club, 1893-
  5. By: Thomas, Betsy Trent
    Type: Article
    In: The Wilson bulletin
    Volume: 95
    Issue: 1
    Date: 1983
    Page Range: 106--117
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  6. By: Thomas, Betsy Trent
    Type: Article
    In: The Wilson bulletin
    Volume: 99
    Issue: 4
    Date: 1987
    Page Range: 571--578
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  7. By: Thomas, Betsy Trent
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 102
    Date: 1982
    Page Range: 48--52
    Publication Info: London, British Ornithologists' Club, 1893-