@misc{indiciaee0d55dae50c6,
  title = {Comparison of the Eastern and Western Kentucky coal fields (Pennsylvanian), USA-why are coal distribution patterns and sulfur contents so different in these coal fields?},
  author = {S.F. Greb and C.F. Eble and D.R. Chesnut},
  year = {2002},
  doi = {10.1016/s0166-5162(02)00115-5},
  url = {https://pubs.usgs.gov/publication/70024816},
  note = {Source identifier: 70024816}
}