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  1. Methods of systematic and taxonomic research on passerine birds: the timely example of the Seicercus burkii complex (Sylviidae)
    By: Martens, Jochen - Eck, S - Päckert, M - Sun, Y-H
    Type: Article
    In: Bonner Zoologische Beiträge
    Volume: 51
    Date: 2003
    Page Range: 109--118
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  2. NOTES ON PHILIPPINE BIRDS 2. A 2ND PHILIPPINE RECORD OF STERNA-BERNSTEINI
    By: Dickinson, E C - Eck, S
    Type: Article
    In: Bulletin of The British Ornithologists' Club
    Volume: 104
    Date: 1984
    Page Range: 72--72
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