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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Coblentz, William W. (William Weber),
    Publication info: Washington, D.C, Carnegie Institution of Washington, 1912
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Coblentz, William W. (William Weber),
    Publication info: Washington, D.C, Carnegie institution of Washington, 1912
    Holding Institution: Cornell University Library