@misc{indiciae1c3b3b886388,
  title = {Nonpoint and Point Sources of Nitrogen in Major Watersheds of the United States},
  author = {Larry J. Puckett},
  year = {1994},
  doi = {10.3133/wri944001},
  url = {https://pubs.usgs.gov/publication/wri944001},
  note = {Source identifier: wri944001}
}