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  1. By: Witherby, Harry F - Hamerton, A E
    Type: Article
    In: Ibis
    Volume: 5
    Series: 8
    Issue: 4
    Date: 1905
    Page Range: 509--524
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Witherby, Harry F - Woosnam, R. B.
    Type: Article
    In: Ibis
    Volume: 1
    Series: 9
    Issue: 1
    Date: 1907
    Page Range: 74--111
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  3. By: Witherby, Harry F
    Type: Article
    In: Ibis
    Volume: 1
    Series: 8
    Issue: 2
    Date: 1901
    Page Range: 237--278
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  4. By: Witherby, Harry F - Woosnam, R. B.
    Type: Article
    In: Ibis
    Volume: 4
    Series: 9
    Issue: 3
    Date: 1910
    Page Range: 491--517
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  5. By: Witherby, Harry F
    Type: Article
    In: Ibis
    Volume: 6
    Series: 7
    Issue: 3
    Date: 1900
    Page Range: 475--492
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  6. By: Witherby, Harry F
    Type: Article
    In: Ibis
    Volume: 3
    Series: 8
    Issue: 4
    Date: 1903
    Page Range: 501--571
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,