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Author/Creator
- Geological Survey (U.S.)7
- Andreasen, David C.4
- Curtin, Stephen E.4
- Mack, Frederick K.4
- Maryland Geological Survey4
- Maryland. Resource Assessment Administration4
- Mississippi. Bureau of Plant Industry1
- Mississippi. Office of Pollution Control1
- Mojave Water Agency (Calif.)1
- National Spatial Data Infrastructure (Program : U.S.)1
- O'Hara, Charles G.1
- Predmore, Steven K.1
- Reed, Thomas B.1
- Stamos, Christina L.1