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By: Conant, B - Novara, A N - Henny, C JType: ArticleIn: Raptor researchVolume: 18Series:Issue: 1Date: 1984Page Range: 36--37Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Henny, C J - Conant, B - Anderson, Daniel W.Type: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 4Date: 1993Page Range: 203--209Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: