1963. Austin, George S. and Sims, Paul K. Magnetic (interpretation of magnetic data collected from airborne or ground surveys, indicating the distribution and concentration of magnetic mine... Minnesota Geological Survey.
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1963. Austin, George S. and Sims, Paul K. Magnetic (interpretation of magnetic data collected from airborne or ground surveys, indicating the distribution and concentration of magnetic mine... Minnesota Geological Survey.
1990. Geologic Map and Topographic Profile of the Elm Creek West Quadrangle, Nebraska. US Geological Survey.
1993. Southwick, Dave L. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments), Archean rocks, bedrock outcrop (rock e... Minnesota Geological Survey.
1966. Green, John C., 1932-, Phinney, William C., and Weiblen, Paul W. Map showing interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Gabbro Lake 15 minut... Minnesota Geological Survey.
1977. Ojakangas, Richard W. and Sims, Paul K. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Lost Lake quadrangle, scale 1:24... Minnesota Geological Survey.
1970. Sims, Paul K. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Minnesota, scale 1:1,000,000. Minnesota Geological Survey.
1976. Morey, G.B. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Minnesota, scale 1:1,000,000. Minnesota Geological Survey.
1993. Morey, G.B. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Minnesota, scale 1:3,000,000. Minnesota Geological Survey.
1994. Morey, G.B. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Minnesota, scale 1:1,000,000,, digit... Minnesota Geological Survey.