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Author/Creator
- Geological Survey (U.S.)4
- Kuzniar, Ronald L.4
- Blome, Charles D.1
- Boyd, Robert A.1
- Caldwell, James P.1
- Cedar Rapids (Iowa)1
- Detroy, Mark G.1
- Iowa. Department of Natural Resources. Geological Survey Bureau1
- Lucey, Keith J.1
- Muscatine Power and Water (Muscatine, Iowa)1
- Schulmeyer, Peter M.1
- University of Iowa. Hygienic Laboratory1