@misc{indiciae266f328a12a9,
  title = {A review of lignite resources of western Tennessee and the Jackson Purchase area, western Kentucky},
  author = {Paul C. Hackley and Peter D. Warwick and Roger E. Thomas and Douglas J. Nichols},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70176226},
  note = {Source identifier: 70176226}
}