@misc{indiciae09132bcd7c60,
  title = {Appraisal of the water resources of the Big Sioux Aquifer, Codington and Grant counties, South Dakota},
  author = {L.D. Putnam and R.C. Thompson},
  year = {1996},
  doi = {10.3133/wri964275},
  url = {https://pubs.usgs.gov/publication/wri964275},
  note = {Source identifier: wri964275}
}