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By: Anthony, Robert G. - Green, Gregory A - Forsman, Eric D - Nelson, S KimType: ArticleIn: The Wilson bulletinVolume: 108Series:Issue: 2Date: 1996Page Range: 280--291Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Green, Gregory A - Anthony, Robert G.Type: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 1Date: 1993Page Range: 60--60Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: