TY  - RPRT
TI  - The difference between the potentiometric surfaces of the upper Patapsco aquifer, September 1990 and September 1999 in southern Maryland
AU  - Stephen E. Curtin
AU  - David C. Andreasen
AU  - Judith C. Wheeler
PY  - 2003
DO  - 10.3133/ofr01209
UR  - https://pubs.usgs.gov/publication/ofr01209
ID  - ofr01209
ER  -