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Geological Survey
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Road maps
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John R. Borchert Map Library
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1. Minnesota
1924. Geological Survey and United States. Bureau of Public Roads. Scale approximately 1:1,710,720. 1 in = 27 miles (W 97°--W 91°/N 49°--N 45°). From the Bureau's Federal aid highway system, page 13. "System as app...