@misc{indiciae60a60bb892d1,
  title = {Water levels in bedrock aquifers in South Dakota},
  author = {Wendell L. Bradford},
  year = {1981},
  doi = {10.3133/ofr81627},
  url = {https://pubs.usgs.gov/publication/ofr81627},
  note = {Source identifier: ofr81627}
}