TY  - RPRT
TI  - The difference between the potentiometric surfaces of the Upper Patapsco aquifer in southern Maryland, September 1990 and September 2009
AU  - Stephen E. Curtin
AU  - David C. Andreasen
AU  - Andrew W. Staley
PY  - 2010
DO  - 10.3133/ofr20101206
UR  - https://pubs.usgs.gov/publication/ofr20101206
ID  - ofr20101206
ER  -