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  1. By: Witherby, H. F. (Harry Forbes),
    Publication info: London,The Office of "Knowledge",1902.
    Holding Institution: University of California Libraries (archive.org)
  2. By: Witherby, H. F. (Harry Forbes),
    Publication info: London,The Office of "Knowledge",1902.
    Holding Institution: American Museum of Natural History Library
  3. By: Witherby, H. F. (Harry Forbes),
    Publication info: London,K. Paul, Trench, Trübner & co., ltd.,1894.
    Holding Institution: Multiple institutions
  4. By: Witherby, H. F. (Harry Forbes),
    Publication info: London :Witherby,1920-24.
    Holding Institution: University of California Libraries (archive.org)
  5. By: Witherby, H. F. (Harry Forbes),
    Publication info: London,Witherby,1920-24.
    Holding Institution: Smithsonian Libraries
  6. By: Witherby, H. F. (Harry Forbes),
    Publication info: [London? :"Knowledge"?,[between 1899 and 1910]
    Holding Institution: Smithsonian Libraries
  1. By: Hartert, Ernst, - Witherby, H. F. (Harry Forbes),
    Type: Article
    In: The Auk
    Volume: 29
    Date: 1912
    Page Range: 407--410
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  2. By: Witherby, H. F. (Harry Forbes),
    Type: Article
    In: The Auk
    Volume: 19
    Date: 1902
    Page Range: 412--412
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  3. By: Witherby, H. F. (Harry Forbes),
    Type: Article
    In: The Auk
    Volume: 31
    Date: 1914
    Page Range: 118--118
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  4. By: Witherby, H. F. (Harry Forbes),
    Type: Article
    In: The Auk
    Volume: 36
    Date: 1919
    Page Range: 597--597
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  5. By: Witherby, H. F. (Harry Forbes),
    Type: Article
    In: The Auk
    Volume: 37
    Date: 1920
    Page Range: 472--472
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  6. By: Witherby, H. F. (Harry Forbes),
    Type: Article
    In: The Auk
    Volume: 37
    Date: 1920
    Page Range: 316--317
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-