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By: Bolen, Eric G. (Eric George), - Chapman, Brian R. - Wilson, Marcia M - Weller, Milton W - Jahn, Laurence R - Robbins, Chandler S. - Samson, Fred BType: ArticleIn: The Wilson bulletinVolume: 93Series:Issue: 3Date: 1981Page Range: 438--456Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: