The difference between the potentiometric surfaces of the Aquia Aquifer, September 1982 and September 1997 in Southern Maryland [microform]
- by Stephen E. Curtin, David C. Andreasen, and Frederick K. Mack ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with the Maryland Geological Survey and Resource Assessment Service, Maryland Department of Natural Resources.
- [Baltimore, Md.] : U.S. Geological Survey ; Denver, Colo. : Branch of Information Services [distributor, 1999]
- Physical description
- 1 map : photocopy ; 20 x 17 cm., on sheet 28 x 22 cm.
- U.S. Geological Survey open-file report ; 99-81.
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