@misc{indiciae680226718b20,
  title = {Water-quality trends in U.S. rivers, 2002 to 2012: Relations to levels of concern},
  author = {Megan E. Shoda and Lori A. Sprague and Jennifer C. Murphy and Melissa L. Riskin},
  year = {2019},
  doi = {10.1016/j.scitotenv.2018.09.377},
  url = {https://pubs.usgs.gov/publication/70200339},
  note = {Source identifier: 70200339}
}