| Reference | {Deposit:: RIO TINTO ZINC MINING ANALYSIS SYSTEM. LEAD AND ZINC MINES}{Deposit:: OF THE WORLD (ZINC). MARCH 25, 1975, P. 22.}{Deposit:: OF THE WORLD (LEAD). MARCH 25, 1975, P. 21.}{Deposit:: RIO TINTO ZINC MINING COST ANALYSIS SYSTEM. PERFORMANCE}{Deposit:: ANALYSIS. MAY 27, 1975, P. 413.}{Deposit:: ANALYSIS. FEBRUARY 25, 1975, P. 266, 294.} |