TY - RPRT TI - Potentiometric surface of the lower Patapsco Aquifer in southern Maryland, September 1994 AU - Stephen E. Curtin AU - Frederick K. Mack AU - David C. Andreasen PY - 1995 DO - 10.3133/ofr95746 UR - https://pubs.usgs.gov/publication/ofr95746 ID - ofr95746 ER -