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  1. By: Drake, C F Tyrwhitt
    Type: Article
    In: Ibis
    Volume: 5
    Series: 2
    Issue: 2
    Date: 1869
    Page Range: 147--154
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Drake, C F Tyrwhitt
    Type: Article
    In: Ibis
    Volume: 3
    Series: 2
    Issue: 4
    Date: 1867
    Page Range: 421--430
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,