@misc{indiciae01da36d880f8,
  title = {Variability of nitrate concentrations in the shallow ground water in a selected area of the San Luis Valley, south-central Colorado},
  author = {Stogner},
  year = {1997},
  doi = {10.3133/fs00497},
  url = {https://pubs.usgs.gov/publication/fs00497},
  note = {Source identifier: fs00497}
}