| Reference | {Deposit:: CATHCART, J., 1973, PHOSPHATE AND BAUXITE INVESTIGATIONS, CO}{Deposit:: USGS OPEN FILE RPT. IR CO-29, 62 PGS.}{Deposit:: DARIO V., J., 1973, THE ECONOMICS OF BAUXITE-ALUMINA-ALUMINU}{Deposit:: COLOMBIA: COLO. SCH. OF MINES QUART., VOL. 68, NO. 4, P. 163}{Deposit:: CATHCART, J., 1972, PHOSPHATE AND BAUXITE INVESTIGATIONS, CO}{Deposit:: USGS OPEN FILE RPT. IR CO-26, 62 PGS.} |