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By: Ellis, David H. (David Harry) - Kéry, MarcType: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 3Date: 2004Page Range: 270--275Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Kéry, MarcType: ArticleIn: The journal of raptor researchVolume: 36Series:Issue: 3Date: 2002Page Range: 213--217Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: