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By: Gawlik, Dale E - Rocque, Deborah AType: ArticleIn: The Wilson bulletinVolume: 110Series:Issue: 1Date: 1998Page Range: 45--55Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Gawlik, Dale EType: ArticleIn: The journal of raptor researchVolume: 26Series:Issue: 3Date: 1992Page Range: 179--183Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Gawlik, Dale E - Bildstein, Keith L. (Keith Louis),Type: ArticleIn: The Wilson bulletinVolume: 102Series:Issue: 1Date: 1990Page Range: 37--48Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: