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By: Thomas, Betsy TrentType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 110Series:Issue:Date: 1990Page Range: 48--51Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Thomas, Betsy TrentType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 113Series:Issue:Date: 1993Page Range: 9--17Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Harrington, B A - Leeuwenberg, F J - Resende, S Lara - Mcneil, R - Thomas, Betsy Trent - Grear, Jason S. - Martinez, E FType: ArticleIn: The Wilson bulletinVolume: 103Series:Issue: 4Date: 1991Page Range: 621--636Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Thomas, Betsy Trent - Ingels, JohanType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 115Series:Issue:Date: 1995Page Range: 226--228Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Thomas, Betsy TrentType: ArticleIn: The Wilson bulletinVolume: 95Series:Issue: 1Date: 1983Page Range: 106--117Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Thomas, Betsy TrentType: ArticleIn: The Wilson bulletinVolume: 99Series:Issue: 4Date: 1987Page Range: 571--578Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Thomas, Betsy TrentType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 102Series:Issue:Date: 1982Page Range: 48--52Publication Info: London, British Ornithologists' Club, 1893-Subjects: