References
ULRIKSEN G., C., MAPA METALOGENICO DE CHILE, BOLETIN NO. 42,1990, #59, P.41.1979-1980 WORLD MINES REGISTER, COMPANIES BY COUNTRY: SANFRANCISCO, MILLER FREEMAN PUBLICATIONS, 1979, P. 91.1978 ENGINEERING AND MINING JOURNAL INTERNATIONAL DIRECTORYOF MINING AND MINERAL PROCESSING OPERATIONS: CHILE: NEWYORK, MCGRAW-HILL INC., 1978, P. 278.RIO TINTO ZINC MINING COST ANALYSIS SYSTEM, PERFORMANCE AN-ALYSIS: MAY 27, 1975.MINING MAGAZINE, SOUTH AMERICA: CHILE: V. 127, NO. 3,1972, P. 305.ARGALL, G. O., CHILE COPPER MINERS SETTING PRODUCTIONRECORDS; GOAL 1,000,000 TONS: WORLD MINING, V. 27,NO. 12, 1974, P. 36-37.WORLD MINING, CHILE: SEA WATER LEACHING PLANT FOR OXIDIZEDORES AT MICHILLA: V. 3, NO. 1, 1967, P. 34.BREWIS, TONY, COMPANIA MINERA CAROLINA DE MICHILLA S.A.,MINING MAGAZINE, 9/90, P.182,184,187,189.ERRAZURIZ, RAFAEL, MICHILLA: A CHILEAN DESERT BLOSSOMS INTOA HABITABLE INDUSTRIAL COMPOUND, MINING ENGINEERING, 8/73,P.42-44.LATIN AMERICAN MINING LETTER, 2/15/84, P.5, VOL 3, NO 4.ENGINEERING AND MINING JOURNAL, 7/86, P.57.MINING ACTIVITY DIGEST, 7/25/86, P.11.MINERALS AND MATERIALS, AUG./SEPT. 1986, P.19.MINING JOURNAL, 8/25/89, P.159.INTERNATIONAL MINING, 7/88, P.80.U.S. EMBASSY TRIP REPORT, 9/28/88, P.2.LATIN AMERICAN MINING LETTER, 5/12/92, P.6, VOL 11, NO 7.