TY  - RPRT
TI  - Potentiometric surface of the lower Potomac Aquifer in Virginia, 1993
AU  - E. C. Hammond
AU  - E. R. McFarland
AU  - M. J. Focazio
PY  - 1994
DO  - 10.3133/ofr94373
UR  - https://pubs.usgs.gov/publication/ofr94373
ID  - ofr94373
ER  -