Reference | {Deposit:: WAAGE, K.M., 1953, REFRACTORY CLAY DEPOSITS OF SOUTH-CENTRAL COLORADO: USGS BULL. 993}{Deposit:: SCHWOCHOW, S.D., 1981, INVENTORY OF NONMETALLIC MINING AND PROCESSING OPERATIONS IN COLORADO: CGS MAP SER. 17}{Deposit:: TRAVER, W.M., JR., 1947, INVESTIGATIONS OF STRATEGIC MINERAL RESOURCES, IN VANDERWILT, J.W., MINERAL RESOURCES OF COLORADO: COLO. STATE MINERAL RESOURCES BAORD, PT. 3, P. 482} |