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By: Bretagnolle, Vincent - Attié, CaroleType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 116Series:Issue:Date: 1996Page Range: 194--197Publication Info: London, British Ornithologists' Club, 1893-Subjects:
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By: Bretagnolle, Vincent - Attié, CaroleType: ArticleIn: Bulletin of the African Bird ClubVolume: 3Series:Issue: 1Date: 1996-03Page Range: 36--36Publication Info: Cambridge, African Bird Club, 1994-Subjects:
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By: Bretagnolle, Vincent - Ghestemme, Thomas - Thiollay, Jean-Marc - Attié, CaroleType: ArticleIn: The journal of raptor researchVolume: 34Series:Issue: 1Date: 2000Page Range: 8--17Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: