@misc{indiciae62401f1aa25d,
  title = {Direct estimation of diffuse gaseous emissions from coal fires: current methods and future directions},
  author = {Mark A. Engle and Ricardo A. Olea and Jennifer M. K. O’Keefe and James C. Hower and Nicholas J. Geboy},
  year = {2013},
  doi = {10.1016/j.coal.2012.10.005},
  url = {https://pubs.usgs.gov/publication/70046458},
  note = {Source identifier: 70046458}
}