Reference | {Deposit:: F1 < HATCH, J. R., AVCIN, M. J., WEDGE, W. K., AND BRADY, L. L. 1976, SPHALERITE IN COALS FROM SOUTHEASTERN IOWA, MISSOURI, AND SOUTHEASTERN KANSAS: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 76-796, 26 P.}{Deposit:: F2 < HATCH, J. R., AVCIN, M. J., AND VAN DORPE, P. E., 1984, ELEMENT GEOCHEMISTRY OF CHEROKEE GROUP COALS (MIDDLE PENNSYLVANIAN) FROM SOUTH-CENTRAL AND SOUTHEASTERN IOWA: IOWA GEOLOGICAL SURVEY TECHNICAL PAPER 5, 108 P.} |