@misc{indiciae8191eb4e7c4d,
  title = {Tourmaline (dravite) from the Boehls Butte anorthosite, Idaho, U.S.A.},
  author = {Anna Hietanen},
  year = {1987},
  doi = {10.17741/bgsf/59.2.002},
  url = {https://pubs.usgs.gov/publication/70014770},
  note = {Source identifier: 70014770}
}