@misc{indiciae7616c8f38e03,
  title = {Water-quality assessment of the central Nebraska basins; summary of data for recent conditions through 1990},
  author = {R. B. Zelt and P. R. Jordan},
  year = {1993},
  doi = {10.3133/ofr93422},
  url = {https://pubs.usgs.gov/publication/ofr93422},
  note = {Source identifier: ofr93422}
}