@misc{indiciae48b1f7ddc812,
  title = {Chemical quality of surface waters of South Dakota, with special reference to selenium, boron, and fluoride},
  author = {L. R. Petri},
  year = {1958},
  doi = {10.3133/ofr5874},
  url = {https://pubs.usgs.gov/publication/ofr5874},
  note = {Source identifier: ofr5874}
}