1932. 2011-12-12T21:40:22Z. 2022-03-29T20:41:01Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Minnesota and Wisconsin.
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1932. 2011-12-12T21:29:55Z. 2022-03-29T20:39:47Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Minnesota and Wisconsin.
1932. 2018-05-29T18:25:19Z. 2020-10-15T22:41:41Z. Minnesota Geological Survey. Minnesota Geological Survey. English. cartographic image. Public. Minnesota and Minnesota.
1932. 2011-12-12T21:30:00Z. 2022-03-29T20:39:47Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Minnesota.
1932. 2012-03-07T17:57:16Z. 2015-04-21T22:03:13Z. Hudson Map Company. Hudson Map Co. ; Distributed by the Ten Thousand Lakes Greater Minnesota Association. English. Public. Minnesota and Iowa.
1932. 2011-12-12T21:30:07Z. 2022-03-29T20:39:48Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Minnesota and Wisconsin.