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By: Mclean, P K - Byrd, Mitchell A.Type: ArticleIn: The journal of raptor researchVolume: 25Series:Issue: 4Date: 1991Page Range: 109--112Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Stinson, C H - Byrd, Mitchell A. - Bean, GlenType: ArticleIn: Raptor researchVolume: 10Series:Issue: 3Date: 1976Page Range: 90--91Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Watts, Bryan D., - Byrd, Mitchell A. - Watts, Marian U.Type: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 1Date: 2004Page Range: 47--54Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: