@misc{indiciaee520fac7f934,
  title = {Geology and ground-water resources of Clay County, Nebraska},
  author = {Charles Franklin Keech and V. H. Dreeszen and F. H. Rainwater},
  year = {1959},
  doi = {10.3133/wsp1468},
  url = {https://pubs.usgs.gov/publication/wsp1468},
  note = {Source identifier: wsp1468}
}