@misc{indiciae8dfb48bc263c,
  title = {Vulnerability of shallow groundwater and drinking-water wells to nitrate in the United States},
  author = {Bernard T. Nolan and Kerie J. Hitt},
  year = {2006},
  doi = {10.1021/es060911u},
  url = {https://pubs.usgs.gov/publication/70046619},
  note = {Source identifier: 70046619}
}