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By: Ellis, David H. (David Harry) - Woffinden, Neil D. - Whitlock, Peter L. - Tsengeg, P.Type: ArticleIn: The journal of raptor researchVolume: 33Series:Issue: 4Date: 1999Page Range: 323--326Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Ellis, David H. (David Harry) - Ellis, M H - Tsengeg, P.Type: ArticleIn: The journal of raptor researchVolume: 31Series:Issue: 3Date: 1997Page Range: 234--240Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Ellis, David H. (David Harry) - Whitlock, Peter L. - Tsengeg, P. - Nelson, R WType: ArticleIn: The journal of raptor researchVolume: 33Series:Issue: 2Date: 1999Page Range: 164--167Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: