| Reference | {Deposit:: RIO TINTO ZINC MINING COST ANALYSIS SYSTEM, PERFORMANCE}{Deposit:: ANALYSIS: FEBRUARY 25, 1975, P. 267.}{Deposit:: ENGINEERING AND MINING JOURNAL INTERNATIONAL DIRECTORY OF}{Deposit:: MINING AND MINERAL PROCESSING OPERATIONS: NEW YORK,}{Deposit:: MCGRAW-HILL, 1978, P. 328.}{Deposit:: MINING AND MINERAL INDUSTRY REPORT-PERU: FOREIGN SERVICE}{Deposit:: DISPATCH: PERU: JANUARY 28, 1959, P. 110-111.} |