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Author/Creator
- Virginia. Division of Soil and Water Conservation65
- Geological Survey (U.S.)54
- Florida. Bureau of Geology8
- Southwest Florida Water Management District (Fla.)8
- Water Resources Council (U.S.)7
- Hunn, James D., 1932-4
- Geological Survey of Alabama3
- Johnson, Melissa L.3
- Bush, Peter W.2
- Cleaves, Emery T.2
- Florida. Dept. of Environmental Regulation2
- Florida. Division of Geology2
- Hampton, E. R.2
- Healy, Henry G.2
- Henderson, S. E.2
- Kuff, Karen R.2
- Maryland Geological Survey2
- Mexico. Comisión Nacional del Agua2
- Minnesota Geological Survey2
- National Atlas & Thematic Mapping Organisation (India)2