@misc{indiciaebe103a408c81,
  title = {Ground water in the Crow Creek-Sand Lake area, Brown and Marshall Counties, South Dakota},
  author = {F. C. Koopman},
  year = {1957},
  doi = {10.3133/wsp1425},
  url = {https://pubs.usgs.gov/publication/wsp1425},
  note = {Source identifier: wsp1425}
}