@misc{indiciaeb41275dad4bd,
  title = {Water-quality assessment of the Potomac River Basin: Occurrence of pesticides in the Great Valley Carbonate subunit},
  author = {Matthew J. Ferrari and Janet M. Denis},
  year = {1999},
  doi = {10.3133/wri984054},
  url = {https://pubs.usgs.gov/publication/wri984054},
  note = {Source identifier: wri984054}
}