@misc{indiciaec882e91cd16b,
  title = {Head fluctuations in artesian wells in the northern Black Hills, South Dakota},
  author = {D. G. Adolphson and E. F. LeRoux},
  year = {1971},
  doi = {10.3133/ofr711},
  url = {https://pubs.usgs.gov/publication/ofr711},
  note = {Source identifier: ofr711}
}