@misc{indiciae385a0c85a57f,
  title = {Garnets in Montana diatremes; a key to prospecting for kimberlites},
  author = {B.C. Hearn and E. S. McGee},
  year = {1982},
  doi = {10.3133/ofr82722},
  url = {https://pubs.usgs.gov/publication/ofr82722},
  note = {Source identifier: ofr82722}
}