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By "Guyard, Anthony "
Geology and mining industry of Leadville, Colorado : with atlas / by Samuel Franklin Emmons
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
Contributed by: University of California Libraries (archive.org)