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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Emmons, Samuel Franklin, - Cross, Whitman, - Guyard, Anthony - Hillebrand, W. F. - Geological Survey (U.S.)
    Publication info: Washington [D.C.], United States Geological Survey, 1886
    Holding Institution: University of California Libraries
    Subjects: Colorado  Geology  Leadville Region  Mines and mineral resources  Mosquito Range