@misc{indiciaecb24a0c31313,
  title = {Use of stable sulphur isotopes to monitor directly the behaviour of sulphur in coal during thermal desulphurization},
  author = {Chao-Li Liu and Keith C. Hackley and D.D. Coleman},
  year = {1987},
  doi = {10.1016/0016-2361(87)90279-1},
  url = {https://pubs.usgs.gov/publication/70015137},
  note = {Source identifier: 70015137}
}