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  1. By: Tomkovich, Pavel S
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 130
    Date: 2010
    Page Range: 88--95
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Kalyakin, Mikhail V - Tomkovich, Pavel S
    Type: Article
    In: Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn
    Volume: 51
    Date: 2003
    Page Range: 167--172
    Publication Info: Bonn, Das Forschungsinstitut,