TY  - RPRT
TI  - Vulnerability of shallow groundwater and drinking-water wells to nitrate in the United States
AU  - Bernard T. Nolan
AU  - Kerie J. Hitt
PY  - 2006
DO  - 10.1021/es060911u
UR  - https://pubs.usgs.gov/publication/70046619
ID  - 70046619
ER  -