@misc{indiciaed393e5de621c,
  title = {Water levels through 1989 in bedrock aquifers in South Dakota},
  author = {Douglas R. Winter},
  year = {1994},
  doi = {10.3133/ofr94320},
  url = {https://pubs.usgs.gov/publication/ofr94320},
  note = {Source identifier: ofr94320}
}