@misc{indiciaea69a37ebd92f,
  title = {Geology and ground-water resources of south-central Nebraska, with special reference to the Platte River Valley between Chapman and Gothenburg},
  author = {Alvin Leonard Lugn and Leland Keith Wenzel},
  year = {1938},
  doi = {10.3133/wsp779},
  url = {https://pubs.usgs.gov/publication/wsp779},
  note = {Source identifier: wsp779}
}