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By: DeLong, Don Clifton - Buehler, David A. - Mersmann, T A - Fraser, James D - Seegar, J K DType: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 1Date: 1993Page Range: 68--68Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: