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By: Dunham, Susie M. - Butcher, Larry - Charlet, David Alan, - Reed, J MType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 4Date: 1996Page Range: 189--193Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Warkentin, Ian George, - Reed, J Michael - Dunham, Susie M.Type: ArticleIn: The Wilson bulletinVolume: 115Series:Issue: 1Date: 2003Page Range: 16--23Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: