@misc{indiciae9e8a9b7c0f99,
  title = {Environmental water-quality zones for streams: A regional classification scheme},
  author = {Dale M. Robertson and D. A. Saad},
  year = {2003},
  doi = {10.1007/s00267-002-2955-5},
  url = {https://pubs.usgs.gov/publication/70026026},
  note = {Source identifier: 70026026}
}