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By: Shirihai, Hadoram - Gargallo, Gabriel - Helbig, Andreas J - Harris, Alan - Cottridge, DavidType: ArticleIn: Bulletin of the African Bird ClubVolume: 9Series:Issue: 2Date: 2002-08Page Range: 110--121Publication Info: Cambridge, African Bird Club, 1994-Subjects:
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By: Gargallo, GabrielType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 114Series:Issue:Date: 1994Page Range: 31--36Publication Info: London, British Ornithologists' Club, 1893-Subjects: