@misc{indiciae5d35cfb8168a,
  title = {Project development and data programs for assessing the quality of the Willamette River, Oregon},
  author = {David A. Rickert and Walter G. Hines and Stuart W. McKenzie},
  year = {1976},
  doi = {10.3133/cir715c},
  url = {https://pubs.usgs.gov/publication/cir715C},
  note = {Source identifier: cir715C}
}