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  1. Geology and mining industry of Leadville, Colorado : with atlas /
    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 (archive.org)
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  2. Geology of the Denver basin in Colorado /
    By: Emmons, Samuel Franklin, - Cross, Whitman, - Eldridge, George Homans,
    Publication info: Washington, :Govt. Print. Off.,1896.
    Holding Institution: University of Connecticut Libraries (archive.org)
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