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  1. By: Unwin, Arthur Harold,
    Publication info: London, T.F. Unwin, 1905
    Holding Institution: University of Toronto - Earth Sciences Library (Noranda)
  2. By: Unwin, Arthur Harold,
    Publication info: London, T. F. Unwin, 1905
    Holding Institution: Multiple institutions
  3. By: Unwin, Arthur Harold,
    Publication info: London, C. Lockwood, [1928]
    Holding Institution: University of British Columbia Library
  4. By: Unwin, Arthur Harold,
    Publication info: London, T.F. Unwin, ltd, [1920]
    Holding Institution: Cornell University Library
  5. By: Unwin, Arthur Harold,
    Publication info: London, T. F. Unwin, ltd, [1920]
    Holding Institution: NCSU Libraries