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By: Pomarol, MType: ArticleIn: The journal of raptor researchVolume: 28Series:Issue: 1Date: 1994Page Range: 19--22Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Pomarol, MType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 3Date: 1996Page Range: 169--172Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: