@misc{indiciaefabb14c8b4f2,
  title = {Geohydrologic reconnaissance of the upper Potomac River basin},
  author = {Frank W. Trainer and Frank A. Watkins},
  year = {1975},
  doi = {10.3133/wsp2035},
  url = {https://pubs.usgs.gov/publication/wsp2035},
  note = {Source identifier: wsp2035}
}