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2. Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay Watershed, Virginia and Maryland
3. Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay Watershed, Virginia and Maryland
4. The difference between the potentiometric surfaces of the upper Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland
5. The difference between the potentiometric surfaces of the lower Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland
6. The difference between the potentiometric surfaces of the Aquia Aquifer, September 1982 and September 1997 in Southern Maryland
7. The difference between the potentiometric surfaces of the Magothy Aquifer, September 1975 and September 1997 in Southern Maryland
8. Potentiometric surface of the Magothy aquifer in southern Maryland, September 1989
9. Potentiometric surface of the Aquia aquifer in southern Maryland, September 1989
10. Potentiometric surface of the Aquia aquifer in southern Maryland during September 1988
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