@misc{indiciae307bb1caa504,
  title = {Nutrients in streams and rivers across the nation — 1992–2001},
  author = {David K. Mueller and Norman E. Spahr},
  year = {2006},
  doi = {10.3133/sir20065107},
  url = {https://pubs.usgs.gov/publication/sir20065107},
  note = {Source identifier: sir20065107}
}