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By: Gonzalez, Cristián A. - Ponce Guevara, Eduardo - Serrano, K P - Soria, H L - Corona, R SType: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 2Date: 2004Page Range: 193--194Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: