@misc{indiciae4a3ff89a32eb,
  title = {13C/12C ratios in calcite associated with heat-altered coals-reply},
  author = {G. Faure and G. Botoman},
  year = {1986},
  url = {https://pubs.usgs.gov/publication/70015301},
  note = {Source identifier: 70015301}
}