@misc{indiciaea4e1b6347b78,
  title = {Methodology for river-quality assessment with application to the Willamette River basin, Oregon},
  author = {David A. Rickert and Walter G. Hines and Stuart W. McKenzie},
  year = {1976},
  doi = {10.3133/cir715m},
  url = {https://pubs.usgs.gov/publication/cir715M},
  note = {Source identifier: cir715M}
}