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  1. By: De W. Miller, W - Courtois, F
    Type: Article
    In: Ibis
    Volume: 1
    Series: 9
    Issue: 3
    Date: 1907
    Page Range: 507--516
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Courtois, F
    Type: Article
    In: Ibis
    Volume: 1
    Series: 10
    Issue: 1
    Date: 1913
    Page Range: 14--16
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,