@misc{indiciae198cf0206773,
  title = {Nitrate in the Columbia Aquifer, central Delmarva Peninsula, Maryland},
  author = {L. J. Bachman},
  year = {1984},
  doi = {10.3133/wri844322},
  url = {https://pubs.usgs.gov/publication/wri844322},
  note = {Source identifier: wri844322}
}