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By: Powers, L R - Dale, Allen - Gaede, Peter A. - Rodes, C - Nelson, L - Dean, John J. - May, J DType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 1Date: 1996Page Range: 15--20Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: