@misc{indiciae39b6e5246302,
  title = {Geology and water resources of the Republican River Valley and adjacent areas, Nebraska},
  author = {George E. Condra},
  year = {1907},
  doi = {10.3133/wsp216},
  url = {https://pubs.usgs.gov/publication/wsp216},
  note = {Source identifier: wsp216}
}