@misc{indiciae72f8b1c8997f,
  title = {Visible and ultraviolet reflectance and luminescence from various Saudi Arabian and Indiana limestone rocks},
  author = {H.V. Watts and H.J. Goldman},
  year = {1967},
  doi = {10.3133/ofr67274},
  url = {https://pubs.usgs.gov/publication/ofr67274},
  note = {Source identifier: ofr67274}
}