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  1. By: Pychaft, W P
    Type: Article
    In: Ibis
    Volume: 1
    Series: 7
    Issue: 1
    Date: 1895
    Page Range: 1--21
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Pychaft, W P
    Type: Article
    In: Ibis
    Volume: 5
    Series: 8
    Issue: 3
    Date: 1905
    Page Range: 440--453
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,