@misc{indiciaeef5c836ab9c8,
  title = {Nitrate in ground water: using a model to simulate the probability of nitrate contamination of shallow ground water in the conterminous United States},
  author = {Kerie J. Hitt and Bernard T. Nolan},
  year = {2005},
  doi = {10.3133/sim2881},
  url = {https://pubs.usgs.gov/publication/sim2881},
  note = {Source identifier: sim2881}
}