@misc{indiciae57e90c7b1508,
  title = {Federal District boundary markers in northern Virginia; condition and preservation issues},
  author = {E. S. McGee},
  year = {1994},
  doi = {10.3133/ofr94592},
  url = {https://pubs.usgs.gov/publication/ofr94592},
  note = {Source identifier: ofr94592}
}