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By: Servheen, C - English, WalterType: ArticleIn: Raptor researchVolume: 10Series:Issue: 3Date: 1976Page Range: 84--87Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Servheen, C - English, WalterType: ArticleIn: Raptor researchVolume: 13Series:Issue: 3Date: 1979Page Range: 79--88Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Rose, E F - English, Walter - Hamilton, AType: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 1Date: 1993Page Range: 92--92Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: