@misc{indiciae21bc40cd6f8c,
  title = {Flame ionization mass spectrometry--Isotope ratio determinations for potassium},
  author = {Howard E. Taylor and John R. Garbarino and S. R. Koirtyohann},
  year = {1991},
  doi = {10.1366/0003702914336444},
  url = {https://pubs.usgs.gov/publication/70185805},
  note = {Source identifier: 70185805}
}