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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mcgregor, P J C
    Type: Article
    In: Ibis
    Volume: 6
    Series: 8
    Issue: 2
    Date: 1906
    Page Range: 285--307
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Mcgregor, P J C
    Type: Article
    In: Ibis
    Volume: 5
    Series: 10
    Issue: 1
    Date: 1917
    Page Range: 1--30
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,