Sapphirine in Precambrian rocks associated with stratabound sulfide deposits, Custer County, Colorado /
Raymond, William H.
Leiggi, Peter A.
Sheridan, Douglas M.
Geological Survey (U.S.)
Washington : U.S. Govt. Print. Off.,
1980.
Bibliography: p. 20-22.
Sapphirine
Geology, Stratigraphic
Sulfides
Geology