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  1. By: Gregory, William K. (William King), - Hellman, Milo,
    Publication info: 1926
    Holding Institution: American Museum of Natural History Library
  2. By: Gregory, William K. (William King), - Hellman, Milo, - Lewis, G. Edward (George Edward)
    Publication info: Washington Carnegie institution of Washington 1938
    Holding Institution: Smithsonian Libraries and Archives
  3. By: Gregory, William K. (William King), - Hellman, Milo, - Miller, Gerrit S. (Gerrit Smith),
    Publication info: 1923
    Holding Institution: American Museum of Natural History Library
  4. By: Gregory, William K. (William King), - Hellman, Milo, - Matthew, William Diller,
    Publication info: 1923
    Holding Institution: American Museum of Natural History Library
  5. By: Brown India Expedition (1921-1925) - Brown, Barnum, - Gregory, William K. (William King), - Hellman, Milo,
    Publication info: 1924
    Holding Institution: American Museum of Natural History Library
  6. By: Hellman, Milo, - Sullivan, Louis R. (Louis Robert),
    Publication info: 1925
    Holding Institution: American Museum of Natural History Library