@misc{indiciaec22ea7935ea8,
  title = {Fluoride content of clay minerals and argillaceous earth materials},
  author = {Josephus Thomas and H.D. Glass and W.A. White and R.M. Trandel},
  year = {2024},
  doi = {10.1346/ccmn.1977.0250405},
  url = {https://pubs.usgs.gov/publication/70009769},
  note = {Source identifier: 70009769}
}