@misc{indiciae638df4b34c5e,
  title = {Aerial gamma-ray contour maps of regional surface concentrations of uranium, potassium, and thorium in New Mexico},
  author = {J. S. Duval},
  year = {1988},
  doi = {10.3133/gp979},
  url = {https://pubs.usgs.gov/publication/gp979},
  note = {Source identifier: gp979}
}