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  1. By: Poynting, John Henry,
    Publication info: London,C. Griffin,1914.
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Poynting, John Henry,
    Edition: 4th ed., rev.
    Publication info: London,C. Griffin,1911.
    Holding Institution: University of Toronto - Gerstein Science Information Centre