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Bedrock geologic map of the Ashland and the northern part of the Ironwood 30 min X 60 min quadrangles, Wisconsin and Michigan

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Originators Cannon, William F.; Woodruff, Laurel G.; Nicholson, Suzanne W.; and Hedgman, Cheryl A.
Publication U.S. Geological Survey Miscellaneous Investigations Series Map I-2566

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