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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Eckel, Edwin Clarence,
    Edition: 1st ed.
    Publication info: New York, Wiley, 1905
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Eckel, Edwin Clarence, - Paulmier, Frederick Clark,
    Publication info: Albany, University of the state of New York, 1902
    Holding Institution: Cornell University Library