1924. Gruner, John W. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Western Mesabi District, Minneso... Minnesota Geological Survey.
1924. Gruner, John W. Longitudinal Section through the Biwabik and Gunflint Formations, scale 1 inch = 1.5 miles. Minnesota Geological Survey.
1907. Shedd & Wright Mfg. Co. Cartographic Details: Scale not given. Townships shown in color, includes grid lines, cities, schools, churches, creameries, "rural routes," and bo... Shedd & Wright (Austin, Minnesota), 1907.
1942. Washington D.C. Land Office. Duplicate; Connections to the International Boundary. Minnesota Geospatial Information Office (MnGeo).