@misc{indiciaed239b3de91b9,
  title = {A spectrophotometric study of the thorium-morin mixed-color system},
  author = {Mary H. Fletcher and Robert G. Milkey},
  year = {1954},
  doi = {10.3133/tei460},
  url = {https://pubs.usgs.gov/publication/tei460},
  note = {Source identifier: tei460}
}