@misc{indiciae61c6f640395b,
  title = {13C 12C exchange between calcite and graphite: A possible thermometer in Grenville marbles},
  author = {J.W. Valley and J. R. O’Neil},
  year = {1981},
  doi = {10.1016/0016-7037(81)90249-0},
  url = {https://pubs.usgs.gov/publication/70011946},
  note = {Source identifier: 70011946}
}