| Reference | {Deposit:: HEYL, A.V., BROCK, M.R., JOLLY, J.L. AND WELLS, C.E., 1965 , REGIONAL STRUCTURE OF THE SOUTHEAST MISSOURI AND ILLINOIS-KENTUCKY MINERAL DISTRICTS, U.S. GEOL SURVEY BULL. 1202-B, P. B1 - B20 .}{Deposit:: SNYDER, F.G. 1968 GEOLOGY AND MINERAL DEPOSITS, MIDCONTINENT UNITED STATES IN RIDGE, J.D., ED. ORE DEPOSITS OF THE UNITED STATES 1933 - 1967 (GRATON-SALES VOLUME): NEW YORK, AM. INST. MINING METAL. PETROLEUM ENGINEERS, V. 1 , P. 258 - 286 .} |