@misc{indiciaef0d32553d6a7,
  title = {Physical and chemical properties of the Potomac River and environs, April-May 1978},
  author = {Richard E. Smith and Raynol E. Herndon},
  year = {1980},
  doi = {10.3133/ofr80745},
  url = {https://pubs.usgs.gov/publication/ofr80745},
  note = {Source identifier: ofr80745}
}