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By: Martinez, D R - Figueroa R., Ricardo - Ocampo, C L - Jaksić, F. M. (Fabian Miguel),Type: ArticleIn: The journal of raptor researchVolume: 32Series:Issue: 2Date: 1998Page Range: 111--115Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: