@misc{indiciae335f691ad53d,
  title = {Bituminous coal production in the Appalachian basin: past, present, and future},
  author = {Robert C. Milici and Desiree E. Polyak},
  year = {2014},
  doi = {10.3133/pp1708d.3},
  url = {https://pubs.usgs.gov/publication/pp1708D.3},
  note = {Source identifier: pp1708D.3}
}