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Map of Wisconsin Iron Ore Resources (1976)
Wisconsin Geological and Natural History Survey
Publications and Maps at the Wisconsin Geological and Natural History Survey
Wisconsin maps at the Wisconsin State Cartographer’s site
USGS Store for topographic maps and other maps
Blog entries for Wisconsin maps
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Map of Frac Sand in Wisconsin
Frac Sand in Wisconsin factsheet (PDF file)
Wisconsin Geological and Natural History Survey
Publications and Maps at the Wisconsin Geological and Natural History Survey
Wisconsin maps at the Wisconsin State Cartographer’s site
USGS Store for topographic maps and other maps
Blog entries for Wisconsin maps