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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Patten, Bradley M. (Bradley Merrill),
    Publication info: Philadelphia, P. Blakiston, [c1920]
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Patten, Bradley M. (Bradley Merrill),
    Publication info: Philadelphia, P. Blakiston's Son & Co, [c1920]
    Holding Institution: University of California Libraries