@misc{indiciaee44146b53fa6,
  title = {Geologic history of natural coal-bed fires, Powder River basin, USA},
  author = {E.L. Heffern and D. A. Coates},
  year = {2004},
  doi = {10.1016/j.coal.2003.07.002},
  url = {https://pubs.usgs.gov/publication/70026866},
  note = {Source identifier: 70026866}
}