@misc{indiciae1fb194edb05d,
  title = {Dryland farming and livestock as sources of nitrate in ground water},
  author = {Joanna N. Thamke and David A. Nimick},
  year = {1998},
  doi = {10.3133/fs01898},
  url = {https://pubs.usgs.gov/publication/fs01898},
  note = {Source identifier: fs01898}
}