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1. Geologic map of western part of Vermilion district, northeastern Minnesota, M-13

1973. Sims, Paul K. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the western Vermilion district, scal...

2. Simple Bouguer gravity map of Minnesota, Roseau sheet, M-12

1973. McGinnis, L., Durfee, George, and Ikola, Rodney J. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ...