Lively, R. S.Morey, G.B.Mossler, John H.Ojakangas, Richard W.Southwick, David L.Weber, R.E. (Geologist)Generalized interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the North Limb, Cottonwood County Basin, Jeffers-Comfrey area, Minnesota, scale 1:48,000.PDFengMinnesota Geological SurveyPublicShorter contributions to the geology of the Sioux Quartzite (early Proterozoic), southwestern Minnesota, RI-32, Plate 1MapsMinnesota1984University of Minnesota