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  1. By: Yong, Dennis - King, Ben F
    Type: Article
    In: Forktail
    Volume: 26
    Date: 2010
    Page Range: 141--142
    Publication Info: Oxford,
  2. By: King, Ben F - Yong, Dennis
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 121
    Date: 2001
    Page Range: 91--93
    Publication Info: London, British Ornithologists' Club, 1893-