@misc{indiciae485d49e4e8a4,
  title = {Geologic map of part of the Rectortown quadrangle, Fauquier and Loudoun Counties, Virginia},
  author = {Gilbert H. Espenshade},
  year = {1983},
  doi = {10.3133/ofr83503},
  url = {https://pubs.usgs.gov/publication/ofr83503},
  note = {Source identifier: ofr83503}
}