@misc{indiciae5fcce4d68c9a,
  title = {Application of aerial gamma-ray spectrometric and magnetic surveys in geologic mapping: a case study in southern Virginia and northern North Carolina},
  author = {J. Wright Horton and David L. Daniels},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/70073917},
  note = {Source identifier: 70073917}
}