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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ratzel, Friedrich,
    Edition: 2. Aufl.
    Publication info: München, R. Oldenbourg, 1893
    Holding Institution: University of California Libraries
  2. By: Ratzel, Friedrich,
    Publication info: München, R. Oldenbourg, 1878-80
    Holding Institution: University of California Libraries