@misc{indiciae1a23b47a52d3,
  title = {Spectrophotometric determination of fluorine in silicate rocks},
  author = {L. C. Peck and V. C. Smith},
  year = {1964},
  doi = {10.1016/0039-9140(64)80192-2},
  url = {https://pubs.usgs.gov/publication/70009991},
  note = {Source identifier: 70009991}
}