TY - RPRT TI - Saltwater intrusion into the Old Bridge aquifer in the Keyport-Union Beach area of Monmouth County, New Jersey AU - F. L. Schaefer AU - Raymond L. Walker PY - 1981 DO - 10.3133/wsp2184 UR - https://pubs.usgs.gov/publication/wsp2184 ID - wsp2184 ER -