@misc{indiciaec4122e44e59c,
  title = {Washington folio, District of Columbia-Maryland-Virginia},
  author = {Nelson Horatio Darton and Arthur Keith},
  year = {1901},
  doi = {10.3133/gf70},
  url = {https://pubs.usgs.gov/publication/gf70},
  note = {Source identifier: gf70}
}