@misc{indiciaeceddcbe45910,
  title = {Water-quality trends in the nation’s rivers and streams, 1972–2012—Data preparation, statistical methods, and trend results},
  author = {Gretchen P. Oelsner and Lori A. Sprague and Jennifer C. Murphy and Robert E. Zuellig and Henry M. Johnson and Karen R. Ryberg and James A. Falcone and Edward G. Stets and Aldo V. Vecchia and Melissa L. Riskin and Laura A. De Cicco and Taylor J. Mills and William H. Farmer},
  year = {2017},
  doi = {10.3133/sir20175006},
  url = {https://pubs.usgs.gov/publication/sir20175006},
  note = {Source identifier: sir20175006}
}