@misc{indiciae000ad7321ce8,
  title = {National Water-Quality Assessment program : the Willamette basin, Oregon},
  author = {Dennis A. Wentz and Stuart W. McKenzie},
  year = {1991},
  doi = {10.3133/ofr91167},
  url = {https://pubs.usgs.gov/publication/ofr91167},
  note = {Source identifier: ofr91167}
}