References
WILLIG, C.D., AND DELGADO, J., 1985, SOUTH AMERICA AS A SOURCE OF TUNGSTEN, PAPER PRESENTED AT THE THIRD INTERNATIONAL TUNGSTEN SYMPOSIUM, MADRID, SPAIN, 36 P.WRIGHT, C.W., 1940, MINERAL RESOURCES, PRODUCTION AND TRADE OF ARGENTINA; U.S. BUREAU OF MINES, FOREIGN MINERALS CIRCULAR, VOL. 3, NO. 3, JULY 1940, P. 28.STAFF, ARGENTINA, INTERNATIONAL MINING, VOL. 3, NO. 8, AUGUST 1986, P. 136.WILLIG, C.D., AND DELGADO, J., SOUTH AMERICA AS A SOURCE OF TUNGSTEN, IN MPR PUBLISHING SERVICES LTD. (ED.), PROCEEDINGS OF THE THIRD INTERNATIONAL TUNGSTEN SYMPOSIUM, MADRID, MAY, 1985, P. 83.BEDER, R., 1922, EL YACIMIENTO DE MINERAL DE TUNGSTENO "LOS AVESTRUCES", DEPARTAMENTO SAN MARTIN - PROVINCIA DE SAN LUIS; ARGENTINA, MINISTERIO DE AGRICULTURA DE LA NACION, DIRECCION GENERAL DE MINAS, GEOLOGIA E HIDROLOGIA, BOLETIN NO. 5, SERIE F, P. 33-37.ANGELELLI, V., FERNANDEZ LIMA, J.C., HERRERA, A., AND ARISTARAIN, L., 1970, DESCRIPCION DEL MAPA METALOGENETICO DE LA REPUBLICA ARGENTINA: MINERALES METALIFEROS; ARGENTINA, MINISTERIO DE MINERIA, DIRECCION NACIONAL DE GEOLOGIA Y MINERIA, ANALES XV, P. 161.ANUAL: WILLIG AND DELGADO, 1985, P. 83. ADEMAS: ANGELELLI ET AL, 1970.