TY - RPRT TI - Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2009 AU - Stephen E. Curtin AU - David C. Andreasin AU - Andrew W. Staley PY - 2010 DO - 10.3133/ofr20101207 UR - https://pubs.usgs.gov/publication/ofr20101207 ID - ofr20101207 ER -