| Reference | {Reserve-Resource:: MARSDEN, R.W. ESTIMATION AND EVALUATION OF THE IRON ORE}{Reserve-Resource:: RESERVES OF THE UNITED STATES - A PARTIAL SURVEY 1974-}{Reserve-Resource:: 75. IRON ORE RESERVES OF THE MESABI RANGE, MINNESOTA.}{Reserve-Resource:: A MINERALS AVAILABILITY SYSTEM REPORT. BUMINES}{Reserve-Resource:: OFR 109-80, 1980, 81 PP.; NTIS PB 80-228984.} |