@misc{indiciae35529924a438,
  title = {Laboratory analysis and airborne detection of materials stimulated to luminesce by the sun},
  author = {W. R. Hemphill and A.F. Theisen and R.M. Tyson},
  year = {1984},
  doi = {10.1016/0022-2313(84)90108-x},
  url = {https://pubs.usgs.gov/publication/70013516},
  note = {Source identifier: 70013516}
}