TY  - RPRT
TI  - Nitrate in Ground Waters of the United States--Assessing the Risk
AU  - Bernard T. Nolan
AU  - Barbara C. Ruddy
PY  - 1998
DO  - 10.3133/fs09296
UR  - https://pubs.usgs.gov/publication/fs09296
ID  - fs09296
ER  -