References
BEALL, J. V., 1969, COPPER IN THE ANDES: MIN. ENG. V. 21, NO. 11, P. 59-90ANACONDA CO STAFF, 1960, EL SALVADOR DEVELOPMENT AND OPERATION: MINING ENG., V. 12, NO. 4, P. 339-382MCMAHON, A. D., 1965, COPPER A MATERIALS SURVEY, U.S.B.M. IC 8225 P-61MINING JOURNAL ANNUAL REVIEW, JUNE, 1969, P. 257-258.MINING JOURNAL ANNUAL REVIEW, JUNE, 1970, P. 299.MINING JOURNAL ANNUAL REVIEW, JUNE, 1972, P. 306-307.AMERICAN METAL MARKET, 1977, V. 85, NO. 150, P. 18.MINING ENGINEERING, 1960, P. 350.RUIZ, C. AND PEEBLES, F., 1988, YACIMIENTOS METALIFEROS DE CHILE: SANTIAGO, 334 P.SWAYNE, W., 1960, GEOLOGY OF EL SALVADOR: MINING ENGINEERING, 12, P. 344-348.GUSTAFSON, L., AND HUNT, J., 1975, THE PORPHYRY COPPER DEPOSIT AT EL SALVADOR, CHILE: ECON GEOL. 70, 857-912.DIAZ, ET AL., 1980, MAPA METALOGENICO PRONOSTICO DE LA III REGION: CORPORACION DE FOMENTO DE LA PRODUCCION, SANTIAGO (5 VOLS.)SILLITOE, R.H., 1988, EPOCHS OF INTRUSION-RELATED COPPER MINERALIZATION IN THE ANDES: JOUR. S. AM. GEOL., 1, 89-108.FIELD, C.W., AND GUSTAFSON, L.B., 1976, OXYGEN AND HYDROGEN ISOTOPES IN THE PORPHYRY COPPER DEPOSIT AT EL SALVADOR, CHILE: ECON. GEOL. 71, 1549-1559.CIMRIDATA ARE FROM MINING JOURNAL ANNUAL REVIEWS, 1969, 1970, AND 1972 AND FROM MINING ENGINEERING, 1960. ALSO BLICK DURCH DIE WIRTSCHAFT 15.3.1977.AMERICAN METAL MARKET, 1977.