TY  - RPRT
TI  - Ground Water Atlas of the United States: Segment 11, Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, West Virginia
AU  - Henry Trapp
AU  - Marilee A. Horn
PY  - 1997
DO  - 10.3133/ha730l
UR  - https://pubs.usgs.gov/publication/ha730L
ID  - ha730L
ER  -