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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ketchum, Milo Smith,
    Edition: 2d ed., enl.
    Publication info: New York, Engineering News Pub. Co, 1907
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Ketchum, Milo Smith,
    Edition: 2d ed.
    Publication info: New York, McGraw-Hill, 1918
    Holding Institution: University of Toronto - Gerstein Science Information Centre