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  1. Ancient mining on the shores of Lake Superior. By Charles Whittlesey.
    By: Whittlesey, Charles,
    Publication info: Washington,Smithsonian Institution,1863
    Contributed by: Boston College Libraries (
    Subjects: Antiquities  Copper mines and mining  Michigan  
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  2. The geology of the Corocoro copper district of Bolivia, by Joseph T. Singewald, jr., and Edward W. Berry.
    By: Singewald, Joseph T. - Berry, Edward Wilber,
    Publication info: Baltimore :The Johns Hopkins Press,1922.
    Contributed by: University of California Libraries (
    Subjects: Bolivia  Copper mines and mining  Corocoro  Geology  Paleontology  
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