| Reference | {Deposit:: WELLER J M ET AL ILL STATE GEOL SUR BULL 76 P 142}{Reserve-Resource:: U. S. BUMINES HEALTH AND SAFETY REPORT, REPORT ON MAJOR}{Reserve-Resource:: HYDROGEN SULFIDE SISASTER, BARNETT COMPLEX MINE,}{Reserve-Resource:: APRIL 12, 1971.}{Reserve-Resource:: BAIN, H. F. THE FLOURSPAR DEPOSITS OF SOUTHERN ILLINOIS.}{Reserve-Resource:: U. S. GEOLOGICAL SURVEY BULLETIN 252, 1905, P. 53.} |