@misc{indiciae86ad5f4ae688,
  title = {Mapping luminescence of uranium-bearing sandstones using an imaging Fraunhofer line discriminator},
  author = {Robert D. Watson and Arnold F. Theisen},
  year = {1977},
  doi = {10.3133/ofr77743},
  url = {https://pubs.usgs.gov/publication/ofr77743},
  note = {Source identifier: ofr77743}
}