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By: Brown, Bryan T. - Mills, G S - Powels, C - Russell, W A - Therres, Glenn D. - Pottie, J JType: ArticleIn: The journal of raptor researchVolume: 33Series:Issue: 3Date: 1999Page Range: 227--232Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: