@misc{indiciaed9231587ab73,
  title = {Boron isotopic composition of tourmaline from massive sulfide deposits and tourmalinites},
  author = {M. R. Palmer and J. F. Slack},
  year = {1989},
  doi = {10.1007/bf01041751},
  url = {https://pubs.usgs.gov/publication/70015504},
  note = {Source identifier: 70015504}
}