| Reference | {Deposit:: BURCHARD, E.F., BUTTS, CHARLES AND ECHEL, E.C., 1910, IRON ORES, FUELS AND FLUXES OF THE BIRMINGHAM DISTRICT: U.S. GEOLOGICAL SURVEY BULL. 400, 198 P.}{Deposit:: SIMPSON, T.A., AND GRAY, T.R., 1970, THE BIRMINGHAM RECLORE DISTRICT, ALABAMA; IN RIDGE I.D. (ED) ORE DEPOSITS OF THE UNITED STATES, 1933-1973; AIME NEW YORK.} |