@misc{indiciae5b989d4f97d3,
  title = {Cretaceous and Eocene lignite deposits, Jackson Purchase, Kentucky},
  author = {J.C. Hower and F.J. Rich and D.A. Williams and A.E. Bland and F.L. Fiene},
  year = {1990},
  doi = {10.1016/0166-5162(90)90053-2},
  url = {https://pubs.usgs.gov/publication/70015772},
  note = {Source identifier: 70015772}
}