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By: Lowther, Peter EType: ArticleIn: The Wilson bulletinVolume: 87Series:Issue: 4Date: 1975Page Range: 481--495Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Lowther, Peter E - Fraga, Rosendo M - Schulenberg, T S - Lanyon, S MType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 124Series:Issue:Date: 2004Page Range: 171--177Publication Info: London, British Ornithologists' Club, 1893-Subjects: