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By: Franson, J. Christian - Thomas, Nancy J. (Nancy Jeanne), - Smith, Marion R. (Marion Russell), - Robbins, A H - Newman, S - Mccartin, P CType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 1Date: 1996Page Range: 7--14Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: