@misc{indiciae23537bd24845,
  title = {Aeroradioactivity map of Elizabethtown and vicinity, North Carolina},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1978},
  doi = {10.3133/ofr78759},
  url = {https://pubs.usgs.gov/publication/ofr78759},
  note = {Source identifier: ofr78759}
}