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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Deutsche Geologische Gesellschaft.
    Publication info: [Berlin, Wilhelm Hertz, 1849-2005
    Holding Institution: Multiple institutions
  2. By: Deutsche Geologische Gesellschaft.
    Publication info: Berlin, J.G. Cotta'sche Buchhandlung Nachfolger, 1912-1929
    Holding Institution: Multiple institutions