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By: Manosa, S - Codina, JType: ArticleIn: The journal of raptor researchVolume: 29Series:Issue: 4Date: 1995Page Range: 273--275Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Manosa, S - Real, J - Codina, JType: ArticleIn: The journal of raptor researchVolume: 32Series:Issue: 3Date: 1998Page Range: 208--214Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: