| Reference | {Deposit:: VALENZUELA, S.R., 1979, GEOLOGY OF THE MAIN WOLFRAM MINES IN BOLIVIA. PRIMARY TUNGSTEN ASSOCIATION, BULLETIN NO. 6, FEB. 1979, P. 6-8.}{Deposit:: WILLIG, C.D. AND DELGADO, J., 1985, SOUTH AMERICA AS A SOURCE OF TUNGSTEN, PRIMARY TUNGSTEN ASSOCIATION, THIRD INTERNATIONAL TUNGSTEN SYMPOSIUM, MADRID, SPAIN, P. 1-36.}{Deposit:: ANSTETT, T.F., BLEIWAS, D.I., AND HURDELBRINK, R.J., 1985, TUNGSTEN AVAILABILITY - MARKET ECONOMY COUNTRIES, U.S. BUREAU OF MINES, INFORMATION CIRCULAR 9025, 51 P.}{Deposit:: WILLIG, C.D. AND DELGADO, J., 1985, SOUTH AMERICA AS A SOURCE OF TUNGSTEN, IN MPR PUBLISHING SERVICES LTD. (ED.), TUNGSTEN: 1985, PROCEEDINGS OF THE THIRD INTERNATIONAL TUNGSTEN SYMPOSIUM, MADRID, MAY 1985, P. 58-85.} |