@misc{indiciae989c289f050e,
  title = {Statistical summary of the chemical quality of surface water in the Powder River coal basin, the Hanna coal field, and the Green River coal region, Wyoming},
  author = {D. A. Peterson},
  year = {1988},
  doi = {10.3133/wri844092},
  url = {https://pubs.usgs.gov/publication/wri844092},
  note = {Source identifier: wri844092}
}