Reference | {Deposit:: LUTTRELL, G. W., 1966, VA. MIN. RES. REPORT 7, P. 89}{Deposit:: ROBERTS, J. K., 1928, VA. GEOLOGICAL SURVEY BULL. 29, P. 132.}{Deposit:: EDMUNDSON, R S, 1938, BARITE DEPOSITS OF VIRGINIA: VIRGINIA GEOLOGICAL SURVEY BULLETIN 53, 85 P.} |