@misc{indiciae3903fe5f7663,
  title = {Distribution of fluorine in unaltered silicic volcanic rocks of the western conterminous United States},
  author = {R.R. Coats and W.D. Gross and L. F. Rader},
  year = {1963},
  doi = {10.2113/gsecongeo.58.6.941},
  url = {https://pubs.usgs.gov/publication/70221068},
  note = {Source identifier: 70221068}
}