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  1. By: Liversidge, Richard
    Type: Article
    In: Bulletin of the African Bird Club
    Volume: 5
    Issue: 2
    Date: 1998-09
    Page Range: 105--107
    Publication Info: Cambridge, African Bird Club, 1994-
  2. By: Liversidge, Richard - Voelker, Gary
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 122
    Date: 2002
    Page Range: 93--109
    Publication Info: London, British Ornithologists' Club, 1893-