@misc{indiciae5a78dbf4ae00,
  title = {Appraisal of the water resources of the Big Sioux Aquifer, Lincoln and Union counties, South Dakota},
  author = {C. A. Niehus and R. F. Thompson},
  year = {1998},
  doi = {10.3133/wri974161},
  url = {https://pubs.usgs.gov/publication/wri974161},
  note = {Source identifier: wri974161}
}