TY  - GEN
T1  - Potentiometric surface of the lower Potomac Aquifer in Virginia
CY  - Richmond, Va. :
CY  - Denver, Colo. :
CN  - I 19.76:
PB  - The Survey ;
PB  - Books and Open-File Reports [Section, distributor,
PP  - Richmond, Va. :
PP  - Denver, Colo. :
N1  - Potentiometric contours.
N1  - "Base from USGS Digital line graph, 250,000."
N1  - Coordinates for map based on: 1993.
N1  - Description based on: 1993.
ID  - 219604
KW  - Groundwater
KW  - Aquifers
KW  - Water table
TI  - Potentiometric surface of the lower Potomac Aquifer in Virginia
ER  -