Reference | {Deposit:: ILL. GEOLOGICAL SURVEY PRINTOUT 1981 #085-229}{Deposit:: STATE OF ILLINOIS DEPT. OF TRANS., DIVISION OF HIGHWAYS.}{Deposit:: SOURCES AND PRODUCERS OF AGGREGATES FOR HIGHWAY}{Deposit:: CONSTRUCTION IN ILLINOIS. BULL. NO. 23, 1973, P. 47.}{Deposit:: RCF LIST 10/81} |