@misc{indiciaefb8f853568b3,
  title = {Geohydrology of the High Plains aquifer system in Nebraska},
  author = {R. A. Pettijohn and Hsiu-Hsiung Chen},
  year = {1982},
  doi = {10.3133/ofr82502},
  url = {https://pubs.usgs.gov/publication/ofr82502},
  note = {Source identifier: ofr82502}
}