| Reference | {Deposit:: STATE OF ILLINOIS DEPT. OF TRANS., DIVISION OF HIGHWAYS.}{Deposit:: SOURCES AND PRODUCERS OF AGGREGATES FOR HIGHWAY}{Deposit:: CONSTRUCTION IN ILLINOIS. BULL. 23, 1973, P. 61.}{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. 86.} |