| Reference | {Deposit:: PINCOCK, ALLEN & HOLT, INC,; THE DEVELOPMENT OF ENGINEERING,}{Deposit:: OPERATING AND ENVIRONMENTAL COST DATA FOR INTERNATIONAL}{Deposit:: COPPER SMELTING AND REFINING OPERATIONS - HUELVA, SPAIN.}{Deposit:: BUMINES CONTRACT J029007; FOR INF., CONTACT S.W. TOWLE,}{Deposit:: TPO, BUMINES-MAFO, DENVER, CO.} |