@misc{indiciae7987cadb8357,
  title = {Deep-coal potential in the Appalachian Coal Basin, USA: The Kentucky model},
  author = {D. C. Haney and D.R. Chesnut},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70019271},
  note = {Source identifier: 70019271}
}