@misc{indiciae83a904bd1c7e,
  title = {Nitrate in aquifers beneath agricultural systems},
  author = {M. R. Burkart and J.D. Stoner},
  year = {2007},
  doi = {10.2166/wst.2007.436},
  url = {https://pubs.usgs.gov/publication/70031037},
  note = {Source identifier: 70031037}
}