@misc{indiciae2d59352b03c3,
  title = {Aeroradioactivity map of south-central North Carolina},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/ofr77206},
  url = {https://pubs.usgs.gov/publication/ofr77206},
  note = {Source identifier: ofr77206}
}