Reference | {Deposit:: PEARRE N HEYL A U S G S BULL 1082K PG 760 1960 PLATE 40 # 16}{Deposit:: PEARRE N HEYL A THE HISTORY OF CHROMITE MINING IN PA & MD PA}{Deposit:: EOL SURVEY I C 14 PGS 15-16 1959}{Deposit:: PEARRE, N. AND A. HEDL. CHROMITE AND OTHER MINERAL DEPOSITS}{Deposit:: IN THE PIEDMONT UPLANDS, MARYLAND. U.S. GEOLOGICAL SURVEY}{Deposit:: CHROMITE PLACER REGIONAL FILE NO 531, USBM, 1943}{Reserve-Resource:: JERMAIN, G., CONFIDENTIAL WAR MINERALS REPORT OF DOLFIELD}{Reserve-Resource:: CHROMITE PLACER REGIONAL FILE NO 531 1943} |