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By: Mazur, K M - James, P C - Fitzsimmons, Michael J. - Langen, Gido - Espie, R H MType: ArticleIn: The journal of raptor researchVolume: 31Series:Issue: 3Date: 1997Page Range: 253--259Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: James, P C - Fox, Glen A - Ethier, T JType: ArticleIn: The journal of raptor researchVolume: 24Series:Issue: 4Date: 1990Page Range: 120--123Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Robertson, H A - James, P CType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 108Series:Issue:Date: 1988Page Range: 79--87Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: James, P CType: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 1Date: 1993Page Range: 61--61Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: James, P C - Robertson, H AType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 105Series:Issue:Date: 1985Page Range: 25--26Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: James, P CType: ArticleIn: The journal of raptor researchVolume: 27Series:Issue: 1Date: 1993Page Range: 89--89Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: