@misc{indiciae220c88f8f406,
  title = {The Tiptop coal-mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents},
  author = {James C. Hower and Kevin R. Henke and Jennifer M.K. O’Keefe and Mark A. Engle and Donald R. Blake and Glenn B. Stracher},
  year = {2009},
  doi = {10.1016/j.coal.2009.08.005},
  url = {https://pubs.usgs.gov/publication/70193898},
  note = {Source identifier: 70193898}
}