@misc{indiciae0877cb32e553,
  title = {Physical and chemical properties of the Potomac River and environs, January 1978},
  author = {Richard E. Smith and Raynol E. Herndon},
  year = {1980},
  doi = {10.3133/ofr80742},
  url = {https://pubs.usgs.gov/publication/ofr80742},
  note = {Source identifier: ofr80742}
}