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By: Christiansen, D A - Reinert, S EType: ArticleIn: The journal of raptor researchVolume: 24Series:Issue: 4Date: 1990Page Range: 84--90Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Reinert, S EType: ArticleIn: Raptor researchVolume: 18Series:Issue: 1Date: 1984Page Range: 25--29Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects: