| Reference | {Deposit:: OFFICE OF ORE ESTIMATION MINES DIRECTORY U OF MN 19}{Deposit:: GREAT NORTHERN IRON ORE PROPERTIES CLEVELAND CLIFFS IRON CO}{Reserve-Resource:: MINERAL RESOURCES RESEARCH CENTER. MINNESOTA MINING}{Reserve-Resource:: DIRECTORY - 1981, ED. BY W.D. TRETHEWAY. UNIV. OF MINN.,}{Reserve-Resource:: MINNEAPOLIS, MINN., 1981, P. 90.} |