Reference | {Deposit:: ILL. GEOLOGICAL SURVEY PRINTOUT 1981 #057-003}{Deposit:: MALHOTRA, R. AND P.A. SMITH. DIRECTORY OF ILLINOIS MINERAL}{Deposit:: PRODUCERS-1974. ILLINOIS STATE GEOLOGICAL SURVEY, MINERAL}{Deposit:: NOTE 64, JULY 1976, P. 70.}{Deposit:: RCF AND CMS LISTS 10/81} |