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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bell, W. B. (William Bonar),
    Publication info: Washington, 1918
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  2. By: Bell, W. B. (William Bonar),
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  3. By: Bell, W. B. (William Bonar),
    Publication info: [Fargo?], Dept. of College Extension, Agricultural College, N.D, 1912
    Holding Institution: Smithsonian Libraries and Archives
  4. By: Bell, W. B. (William Bonar),
    Publication info: Washington, Govt. Print. Off, 1921
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library