TY - RPRT TI - Hydrogeology and water quality of the West Valley Creek Basin, Chester County, Pennsylvania AU - Lisa A. Senior AU - Ronald A. Sloto AU - Andrew G. Reif PY - 1997 DO - 10.3133/wri944137 UR - https://pubs.usgs.gov/publication/wri944137 ID - wri944137 ER -