U.S. Mine

ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES, 1989, DIRECTORY OF ACTIVE MINES IN ARIZONA, INCORPORATING SAND AND GRAVEL OPERATIONS--1989-90: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY, 14 P.NIEMUTH, N.J., 1987, ARIZONA MINERAL DEVELOPMENT 1984-1986: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY 29, 46 P.SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: UNITED STATS BUREAU OF MINES SPECIAL PUBLICATION, 334 P.METALS ECONOMICS GROUP, 1987, A STUDY OF ACTIVE U.S. GOLD MINES: BOULDER, COLORADO, P. 73-77.CIMRISAWYER AND OTHERS, 1992.NIEMUTH, 1987; SAWYER AND OTHERS, 1992; METALS ECONOMICS GROUP, 1987.