@misc{indiciae557157d79f1f,
  title = {The determination of fluoride in silicate rocks by ion-selective electrode; an update},
  author = {Herbert Kirschenbaum},
  year = {1988},
  doi = {10.3133/ofr88588},
  url = {https://pubs.usgs.gov/publication/ofr88588},
  note = {Source identifier: ofr88588}
}