@misc{indiciae49be4835103e,
  title = {Commentary on the sphalerite geobarometer},
  author = {P. Toulmin and P. B. Barton and L.B. Wiggins},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70015001},
  note = {Source identifier: 70015001}
}