@misc{indiciae7fe99ecbbc2e,
  title = {Nitrate in Streams in the Great Valley Carbonate Subunit of the Potomac River Basin},
  author = {Janet M. Denis and Joel D. Blomquist},
  year = {1995},
  doi = {10.3133/fs16195},
  url = {https://pubs.usgs.gov/publication/fs16195},
  note = {Source identifier: fs16195}
}