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Minnesota Geological Survey
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1969
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11. Glacial and vegetational history of northeastern Minnesota, SP-11, Plate 6
1969. Wright, Herb E., Jr. and Watts, W.A. Pollen diagram (types of pollen in lake sediment)for Weber Lake, Lake County, Minnesota.
12. Paleozoic lithostratigraphic nomenclature for southeastern Minnesota, IC-6, Plate 1
1969. Austin, George S. Paleozoic (age of rocks) Stratigraphic Nomenclature (formalized descriptions and terminology) for Southeastern Minnesota.
13. The proposed Voyageurs National Park: Its geology and mineral potential, 1969, Plate 1
1969. Minnesota Geological Survey. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of proposed Voyageurs National Park, No...