Geology and ore deposits of the upper Blue River area, Summit County, Colorado /
Singewald, Quentin D.(Quentin Dreyer),1902-
Washington, [D.C.] : U.S. G.P.O.,
1951.
Seven folded leaves in pocket.
Prepared in cooperation with the Colorado Geological Survey Board and the Colorado Metal Mining Fund.
Includes bibliography and index.
Geology
Ore deposits
Mines and mineral resources