Biodiversity Heritage Library
By "Cross, Whitman, 1854-1949"
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)
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)