@misc{indiciaecb12e8a0218e,
  title = {The nature of the volatile matter of coal as evolved under different conditions},
  author = {H. C. Porter},
  year = {2002},
  doi = {10.1021/ja01951a028},
  url = {https://pubs.usgs.gov/publication/70011135},
  note = {Source identifier: 70011135}
}