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By: Pearson, Robert R - Livezey, Kent BType: ArticleIn: The journal of raptor researchVolume: 37Series:Issue: 4Date: 2003Page Range: 265--276Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Livezey, Kent BType: ArticleIn: The journal of raptor researchVolume: 39Series:Issue: 1Date: 2005Page Range: 102--103Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: