| Reference | {Deposit:: RIO TINTO ZINC MINING COST ANALYSIS SYSTEM, PERFORMANCE}{Deposit:: ANALYSIS: JUNE 10, 1975, P. 152.}{Deposit:: ENGINEERING AND MINING JOURNAL, SOUTH AMERICAN AND CARIB-}{Deposit:: BEAN: V. 176, NO. 1, 1975, P. 78.}{Deposit:: MINING MAGAZINE, AMERICAS: PERUVIAN COPPER: V. 133, NO. 6,}{Deposit:: MINING MAGAZINE, THE MINERAL INDUSTRY OF PERU: V. 131,}{Deposit:: NO. 4, 1974, P. 262-285.}{Deposit:: MEMORANDUM, U, S. BUREAU OF MINES, WASHINGTON, D. C.: DEC-}{Deposit:: EMBER 16, 1974.}{Reserve-Resource:: WORLD MINING, NOVEMBER 1973.} |