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By: Parris, S D - Klaas, E E - Wilson, Ruth A.Type: ArticleIn: Raptor researchVolume: 14Series:Issue: 3Date: 1980Page Range: 88--89Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Bennett, Richard S. Jr. - Klaas, E EType: ArticleIn: Raptor researchVolume: 20Series:Issue: 2Date: 1986Page Range: 75--76Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Varland, Daniel E. - Klaas, E E - Loughin, Thomas MType: ArticleIn: The journal of raptor researchVolume: 25Series:Issue: 1Date: 1991Page Range: 9--17Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: