| Reference | {Deposit:: PINCOCK, ALLEN & HOLT, INC.; THE DEVELOPMENT OF ENGINEERING,}{Deposit:: OPERATING AND ENVIRONMENTAL COST DATA FOR INTERNATIONAL}{Deposit:: COPPER SMELTING AND REFINING OPERATIONS - NKANA, ZAMBIA.}{Deposit:: BUMINES CONTRACT J0290007; FOR INF., CONTACT S.W. TOWLE,}{Deposit:: TPO, BUMINES-MAFO, DENVER, CO.}{Deposit:: MINING JOURNAL, LONDON; CHILEAN TECHNOLOGY UPDATES NKANA}{Deposit:: SMELTER, ZAMBIA, FEB. 14, 1992, P. 121.} |