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By: Gjershaug, Jan Ove, - Rov, N - Nygard, T - Prawiradilaga, D M - Afianto, M Y - Hapsoro - Supriatna, AType: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 4Date: 2004Page Range: 343--349Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: