@misc{indiciae07cf47012060,
  title = {A practical framework for river-quality assessment},
  author = {David A. Rickert and Walter G. Hines},
  year = {1975},
  doi = {10.3133/cir715a},
  url = {https://pubs.usgs.gov/publication/cir715A},
  note = {Source identifier: cir715A}
}