@misc{indiciaec76050f60eac,
  title = {Nitrate concentrations in ground water of the central Columbia Plateau},
  author = {Sarah J. Ryker and Joseph L. Jones},
  year = {1995},
  doi = {10.3133/ofr95445},
  url = {https://pubs.usgs.gov/publication/ofr95445},
  note = {Source identifier: ofr95445}
}