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, US GEOLOGICAL SURVEY BULL. 1202 - B, P. B1 - B20 .}{Deposit:: WINSLOW, ARTHUR, 1894, LEAD AND ZINC DEPOSITS: MISSOURI GEOLOGICAL SURVEY, V. 7, P. 678.} |