@misc{indiciaea37f37e8cd30,
  title = {Chemical analyses of surface waters in the Niobrara River basin, Nebraska, November 1945 to September 1949},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1951},
  doi = {10.3133/ofr51162},
  url = {https://pubs.usgs.gov/publication/ofr51162},
  note = {Source identifier: ofr51162}
}