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By: Duke, Gary E. - TerEick, Amy L. - Reynhout, J K - Bird, David M. (David Michael), - Place, A EType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 4Date: 1996Page Range: 213--218Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: