Broderick, T.M.Grout, Frank F. (Frank Fitch), 1880-1958Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Eastern Mesabi District, Minnesota, scale 1:31,250.PDFengMinnesota Geological SurveyPublicMagnetite deposits of northeastern Mesabi range, Minnesota, Bulletin 17, Plate 1MapsMinnesota1919University of Minnesota