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By: Martin, E MType: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 4Date: 2004Page Range: 312--319Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Martin, E M - Ruos, J LType: ArticleIn: Raptor researchVolume: 10Series:Issue: 3Date: 1976Page Range: 88--88Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects: