TY - RPRT TI - Map showing the potentiometric surface of the Magothy Aquifer in southern Maryland, September 1979 AU - Frederick K. Mack AU - J. C. Wheeler AU - Stephen E. Curtin PY - 1980 DO - 10.3133/ofr80959 UR - https://pubs.usgs.gov/publication/ofr80959 ID - ofr80959 ER -