TY - RPRT TI - Hydrogeology, degradation of ground-water quality, and simulation of infiltration from the Delaware River into the Potomac aquifers, northern Delaware AU - S.W. Phillips PY - 1987 DO - 10.3133/wri874185 UR - https://pubs.usgs.gov/publication/wri874185 ID - wri874185 ER -