@misc{indiciaeb7ba27e2ecf6,
  title = {Records of water levels in unconsolidated deposits in eastern South Dakota},
  author = {Wendell L. Bradford},
  year = {1981},
  doi = {10.3133/ofr81924},
  url = {https://pubs.usgs.gov/publication/ofr81924},
  note = {Source identifier: ofr81924}
}