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  1. By: Duckworth, J W - Alström, Per - Davidson, Peter J. A. - Evans, Tom D. - Poole, Colin M. - Setha, Tan - Timmins, R. J.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 121
    Date: 2001
    Page Range: 152--182
    Publication Info: London, British Ornithologists' Club, 1893-