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  1. By: Bastin, Harold.
    Publication info: London, Methuen, 1917
    Holding Institution: Internet Archive
  2. By: Bastin, Harold.
    Publication info: London, Methuen, 1917
    Holding Institution: University of California Libraries
  3. By: Bastin, Harold.
    Publication info: London, T.C. & E.C. Jack, 1913
    Holding Institution: University of Toronto - Gerstein Science Information Centre