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Publisher
- Geological Survey (U.S.)2
- Geological Survey Division (Urbana, Ill.)2
- National Geospatial-Intelligence Agency2
- American Geographical Society of New York1
- Indiana Dept. of Conservation, Geological Survey1
- Indiana Geological Survey1
- ML InfoMap (Firm)1
- Ohio. Division of Geological Survey1
- Union County Board of Chosen Freeholders1