Reference | {Deposit:: BURCHARD, E.F. AND BUTTS, CHARLES, 1910, IRON ORES, FUELS AND FLUXES OF THE BIRMINGHAM DISTRICT, ALABAMA: U.S. GEOLOGICAL SURVEY BULL. 400, P67-68.}{Deposit:: JOHNSON, L.H., 1950, TRACKLESS MINING IMPROVES ORE PRODUCTION FOR TCI: MINING ENGINEERING V. 1, NO.12, P.1225-1235} |