1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 10, Geology map of Townships 60 and 61 North, Range 1 West, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
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1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 11, Geology map of Township 61 North, Range 1 East, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 12, Geology map of parts of Townships 61 and 62 North, Range 2 East, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 13, Geology map of Townships 59 and 60 North, Range 3 West, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 14, Geology map of Township 60 North, Range 2 West, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 15, Geology map of Township 59 North, Range 4 West, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 16, Geology map of Township 58 North, Range 5 West, Cook County, Minnesota, scale 1 inch = about 1/2 mile. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Geology of Cook County, Minnesota, 1 inch = about 4 miles. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Geology of the Gunflint District, Minnesota, scale 1:24,000. Minnesota Geological Survey.
1959. Grout, Frank F. (Frank Fitch), 1880-1958, Schwartz, George M. (George Melvin), 1892-1980, and Sharp, R.P. (Surveyor). Plate 3A, Geology of the Gunflint District, Minnesota, scale 1:24000. Minnesota Geological Survey.