@misc{indiciae9087d7db9a21,
  title = {Aeroradiometric maps of parts of the South Boston and Emporia 30' x 60' quadrangles, Virginia and North Carolina},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1994},
  doi = {10.3133/ofr94253},
  url = {https://pubs.usgs.gov/publication/ofr94253},
  note = {Source identifier: ofr94253}
}