@misc{indiciae73d54188b7a1,
  title = {Characterizing coal beds in western Kentucky with the Al-La-Sc coherent triad},
  author = {L.L. Chyi and J.H. Medlin},
  year = {1996},
  doi = {10.1016/0166-5162(95)00054-2},
  url = {https://pubs.usgs.gov/publication/70019097},
  note = {Source identifier: 70019097}
}