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By: Appleby, Bridget M. - Redpath, S MType: ArticleIn: The journal of raptor researchVolume: 31Series:Issue: 1Date: 1997Page Range: 65--70Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Redpath, S M - Wyllie, IanType: ArticleIn: The journal of raptor researchVolume: 28Series:Issue: 2Date: 1994Page Range: 115--117Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: