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Creator
- Alpha Phi Omega1
- American Geographical Society of New York1
- Conrad, J.5
- Dempsey, W. J.1
- Dempsey, W. J., cartographer.1
- Duffner, R. T.1
- Geological Survey (U.S.)3
- Guiney, Donald1
- Hart, John Fraser1
- Henderson, John R.3
- Homer Warren and Company.1
- Iowa. Department of Transportation.9
- Kent, Frederick W. (Frederick Wallace), 1894-19841
- Meuschke, J. L.1
- Mudgett, Helen Parker, 1900-19624
- Rutgers University1
- Stapleton, John T., cartographer.1
- Tax, Sol, 1907-19951
- University of Iowa8
- Wisconsin Department of Natural Resources2