TY - RPRT TI - Potentiometric surface of the upper Patapsco aquifer in southern Maryland, September 2000 AU - Stephen E. Curtin AU - David C. Andreasen AU - Judith C. Wheeler PY - 2002 DO - 10.3133/ofr02246 UR - https://pubs.usgs.gov/publication/ofr02246 ID - ofr02246 ER -