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By: Bowden, Christopher G R - Hayman, P V - Martins, R P - Robertson, Peter A - Mudd, S H - Woodcock, MartinType: ArticleIn: Bulletin of the African Bird ClubVolume: 2Series:Issue: 1Date: 1995-03Page Range: 31--38Publication Info: Cambridge, African Bird Club, 1994-Subjects: