Reference | {Deposit:: CARPENTER, III, P ALBERT, 1976, NC DEPT OF NAT AND ECON}{Deposit:: RESOURCES BULL 84, P. 137.}{Deposit:: PARDEE, J T & PARK, JR., C F, 1948, USGS PROF PAPER 213,}{Deposit:: PP. 95-97.}{Deposit:: MSHA INSPECTORS 1978}{Deposit:: MSHA INSP. 1981} |