1999. Chandler, Val W., Jirsa, Mark A., and Runkel, Anthony C. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of northwestern Minnesota, scale 1:200,... Minnesota Geological Survey.
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1999. Chandler, Val W. and Miller, James D., Jr. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of part of the Duluth Complex, scale 1:... Minnesota Geological Survey.