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By: Garber, Christopher S. - Wallen, Richard L. - Duffy, KatharineType: ArticleIn: The journal of raptor researchVolume: 25Series:Issue: 4Date: 1991Page Range: 120--122Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Garber, Christopher S. - Mutch, B D - Platt, SType: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 3Date: 1993Page Range: 169--171Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: