@misc{indiciae5a13dec03ed8,
  title = {Nutrients in groundwaters of the conterminous United States, 1992-1995},
  author = {B. T. Nolan and J.D. Stoner},
  year = {2000},
  doi = {10.1021/es9907663},
  url = {https://pubs.usgs.gov/publication/70022942},
  note = {Source identifier: 70022942}
}