@misc{indiciaec939ae8fe6a8,
  title = {Map of roads and ditches of the Great Dismal Swamp, Virginia and North Carolina},
  author = {Virginia Carter and C.P. Baker},
  year = {1978},
  doi = {10.3133/ofr7886},
  url = {https://pubs.usgs.gov/publication/ofr7886},
  note = {Source identifier: ofr7886}
}