TY  - RPRT
TI  - Altitude and configuration of the potentiometric surface in Upper Elk Creek watershed, Chester County, Pennsylvania, January through June 1999
AU  - Abdul Mohammad
PY  - 2000
DO  - 10.3133/ofr99475
UR  - https://pubs.usgs.gov/publication/ofr99475
ID  - ofr99475
ER  -