@misc{indiciae7fdd407a734a,
  title = {The determination of small and large amounts of fluorine in rocks},
  author = {Frank Saverio Grimaldi and Blanche Ingram and Frank Cuttitta},
  year = {1954},
  doi = {10.3133/tei492},
  url = {https://pubs.usgs.gov/publication/tei492},
  note = {Source identifier: tei492}
}