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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ott, Isaac,
    Edition: Ed. 3, rev.
    Publication info: Philadelphia, Davis, 1909
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Ott, Isaac,
    Edition: 2d ed., rev. and enl.
    Publication info: Philadelphia, F. A. Davis company, 1907
    Holding Institution: Columbia University Libraries