@misc{indiciae97cbc58c0eda,
  title = {Records of water levels in the Big Sioux Aquifer, Minnehaha County, South Dakota, 1981},
  author = {Douglas R. Winter},
  year = {1983},
  doi = {10.3133/ofr821020},
  url = {https://pubs.usgs.gov/publication/ofr821020},
  note = {Source identifier: ofr821020}
}