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The difference between the potentiometric surfaces of the upper Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland [microfo[...]
Curtin, Stephen E.; Andreasen, David C.; Mack, Frederick K.; Geological Survey (U.S.); M[...]
Baltimore, Md. : U.S. Geological Survey ; Denver, Colo. : Branch of Information Services [distributor], [1999]
QE75 .O63 no.99-86 | Available at Government Documents Microfiche |
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