Preliminary bedrock geology maps of an area of northcentral Minnesota. Explanatory text and two map sheets. Plate 1-Database; Plate 2-Bedrock geology, scale 1:250,000. Superseded by Minnesota Geological Survey publication M-67.
Jirsa, M.A.; Boerboom, T.J..
Preliminary bedrock geologic map of parts of Koochiching, Itasca, and Beltrami Counties, north-central Minnesota.
Minnesota Geological Survey.
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