@misc{indiciae2e40e5ab97e0,
  title = {Preliminary report on the geology and water resources of Nebraska west of the one hundred and third meridian},
  author = {N. H. Darton},
  year = {1903},
  doi = {10.3133/pp17},
  url = {https://pubs.usgs.gov/publication/pp17},
  note = {Source identifier: pp17}
}