References
JAMES, H. L., ET. AL., 1968, U. S. G. S. PROF. PAPER 570JAMES, H. L., 1955, ZONES OF REGIONAL METAMORPHISM IN THE PRECAMBRIAN OF NORTHERN MICH., G. S. A. BULL., V. 66, P. 1455-1488.DUTTON, C. E., P. W. ZIMMER, 1968, IRON ORE DEPOSITS - MENOMINEE DIST., MICH., IN ORE DEP. U. S. 1933-1967, THE GRATON-SALES VOL., J. D. RIDGE, ED., V. 1, P. 538-549.JAMES, H.L., DUTTON, C.E., PETTIJOHN, F.J., WIER, K.L., 1968, GEOLOGY AND ORE DEPOSITS OF THE IRON RIVER, CRYSTAL FALLS DISTRICT, IRON COUNTY, MICHIGAN. WASHINGTON, U.S. GOVT. PRINTING OFFICE, 1968. PP. 45-56, 88-110.LAKE SUPERIOR IRON ORE ASSOCIATION, 1952, LAKE SUPERIOR IRON ORES (2ND ED.): CLEVELAND, OHIO. P. 122.REED, R.C., 1975, ONE THOUSAND MILLION TONS, MICHIGAN IRON ORE SHIPMENTS THROUGH 1974, CIRCULAR 12, GEOLOGICAL SURVEY DIVISION OF MICHIGAN DEPT. OF NATURAL RESOURCES, LANSING, MICHIGAN, 1975. P. 9.JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, IRON COUNTY, P. 302-306, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.LAKE SUPERIOR IRON ORES, 1952, P. 122.; SKILLINGS, MAY 1972, V. 61, N. 22, P. 15 AND JUNE 1971, V. 60, N. 26, P. 119.; SKILLINGS, JAN. 27, 1973, V. 62, NO. 4, P. 14