Pocos De Caldas Cba

E/MJ, AUGUST 1977, P.167-168.E/MJ, MINING ACTIVITY DIGEST, MAR.17,1978, P.13-14.E/MJ, MINING ACTIVITY DIGEST, FEB.13,1981, P.11.METALS WEEK, JAN. 26,1981, P.2.MICHELL, W.D., MINING ENGINEERING, MAR. 1977, P.55.MINING ENGINEERING, V.25, NO. 11, NOV. 1973, P.38-39.MINING JOURNAL, NOV.25, 1977, P.442.WORLD MINING, ALCOA FILES REQUEST FOR PERMITS TO MINEAMAZON BASIN BAUXITE DEPOSITS, JAN. 1977, P.55-56.WORLD MINING, OCT. 1977, P.166.