Reference | {Deposit:: BUREAU OF MINES, WAR MIN. MEMORANDUM, MINERAL HILLS MINE, CA}{Deposit:: CO, MARYLAND, REGIONAL FILE NO. E 296, FEB 1943. (CONFIDENTI}{Deposit:: CONFIDENTIAL WAR MIN REPT FILE, MISC. REPTS, MINERAL HILL MI}{Deposit:: CARROLL CO, MD.}{Deposit:: ESPENSHADE, GILBERT K., REPT. ON MARYLAND COPPER MINES AND P}{Deposit:: S, USGS, AUG 13, 1942 (CONFIDENTIAL) P.6.}{Deposit:: HEYL, ALLEN V, AND PEARRE, NANCY C, MD BOARD OF NAT RES MD G}{Deposit:: SUR BULL 28, 1965, PP 66.} |