@misc{indiciae2613c6e04aeb,
  title = {Progress report on the ground-water resources of the Lower South Platte River Valley between Hardin, Colorado, and Paxton, Nebraska, with a section on the chemical quality of the ground water},
  author = {L.J. Bjorklund and J.A. Tavelli and H. A. Swenson},
  year = {1949},
  doi = {10.3133/ofr4955},
  url = {https://pubs.usgs.gov/publication/ofr4955},
  note = {Source identifier: ofr4955}
}