TY - RPRT TI - Apparent chlorofluorocarbon age of ground water of the shallow aquifer system, Naval Weapons Station Yorktown, Yorktown, Virginia AU - David L. Nelms AU - George E. Harlow AU - Allen R. Brockman PY - 2001 DO - 10.3133/wri014179 UR - https://pubs.usgs.gov/publication/wri014179 ID - wri014179 ER -