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  1. By: Haagner, Alwin C
    Type: Article
    In: Ibis
    Volume: 1
    Series: 8
    Issue: 1
    Date: 1901
    Page Range: 15--18
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Haagner, Alwin C
    Type: Article
    In: Ibis
    Volume: 1
    Series: 8
    Issue: 2
    Date: 1901
    Page Range: 190--194
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  3. By: Haagner, Alwin C
    Type: Article
    In: Ibis
    Volume: 2
    Series: 8
    Issue: 4
    Date: 1902
    Page Range: 569--581
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,