Reference | {Deposit:: DIETRICH, R.V., 1954, GEOLOGY OF THE PILOT MOUNTAIN AREA, VIRGINIA: BULLETIN OF THE VIRGINIA POLYTECHNIC INSTITUTE, ENGINEERING EXPERIMENT STATION SERIES NO. 91, V. 47, NO. 4, 32}{Deposit:: 1953 GEOLMAP VA. ENG. EXP. STA: ISSUED SER. NO. 91} |