@misc{indiciaec9af0edfc030,
  title = {The geology and palynology of lower and Middle Pennsylvanian strata in the Western Kentucky Coal Field},
  author = {C.F. Eble and S.F. Greb and D.A. Williams},
  year = {2001},
  doi = {10.1016/s0166-5162(01)00042-8},
  url = {https://pubs.usgs.gov/publication/70023064},
  note = {Source identifier: 70023064}
}