TY - RPRT TI - Potentiometric surface of the Aquia Aquifer in southern Maryland during September 1988 AU - Frederick K. Mack AU - David C. Andreasen AU - Stephen E. Curtin AU - Judith C. Wheeler PY - 1990 DO - 10.3133/wri904037 UR - https://pubs.usgs.gov/publication/wri904037 ID - wri904037 ER -