| Reference | {Deposit:: MCKNIGHT, E.T., NEWMAN, W.L., AND HEYL, A.V., JR. (COMPILERS), 1962, ZINC IN THE UNITED STATES, EXCLUSIVE OF ALASKA AND HAWAII: USGS MINERAL INV. RESOURCE MAP MR-19, SEPARATE TEXT, 18 P.}{Deposit:: HEYL, A.V., LYONS, E.J., AGNEW,A.F., AND BEHRE, C.H., JR., 1955, ZINC-LEAD-COPPER RESOURCES AND GENERAL GEOLOGY OF THE UPPER MISSISSIPPI VALLEY DISTRICT: USGS BULL. 1015-G, P. 227-243.} |