TY - RPRT TI - Potentiometric surface of the Aquia Aquifer in southern Maryland, September 1993 AU - Stephen E. Curtin AU - Frederick K. Mack AU - D. C. Andreasen PY - 1994 DO - 10.3133/ofr94390 UR - https://pubs.usgs.gov/publication/ofr94390 ID - ofr94390 ER -