| Reference | {Deposit:: NICKDATA INC. A COMPREHENSIVE NICKEL INDUSTRY COST DATA}{Deposit:: BASE AND COSTING PROGRAM. ILMAR J. MARTENS AND}{Deposit:: THOMAS F. TORRIES, 1986.}{Deposit:: OCT 30, 1987.}{Deposit:: MINING JOURNAL, LONDON, VOL. 315, NO. 8091, OCT.5, 1990.} |