@misc{indiciae04fa6d3ef946,
  title = {Interim results of quality-control sampling of surface water for the Upper Colorado River National Water-Quality Assessment Study Unit, water years 1995-96},
  author = {N.E. Spahr and R.W. Boulger},
  year = {1997},
  doi = {10.3133/wri974227},
  url = {https://pubs.usgs.gov/publication/wri974227},
  note = {Source identifier: wri974227}
}