@misc{indiciae4e4e2c7131dc,
  title = {Nitrate in ground water in the Great Valley carbonate subunit of the Potomac River Basin},
  author = {Matthew J. Ferrari and Scott W. Ator},
  year = {1995},
  doi = {10.3133/wri954099},
  url = {https://pubs.usgs.gov/publication/wri954099},
  note = {Source identifier: wri954099}
}