@misc{indiciae80e2b87efeb3,
  title = {Resource assessment of the Springfield, Herrin, Danville, and Baker coals in the Illinois Basin},
  author = {Joe Hatch and Russ Jacobson and Maria Mastalerz and William Andrews and Jerry Weisenfluh and Ron Affolter and Greg Gunther},
  year = {2002},
  doi = {10.3133/fs07202},
  url = {https://pubs.usgs.gov/publication/fs07202},
  note = {Source identifier: fs07202}
}