@misc{indiciaee9b02bc21dd5,
  title = {Paleoecological interpretation of a middle Pennsylvanian coal bed in the central Appalachian basin, U.S.A.},
  author = {C.F. Eble and W.C. Grady},
  year = {1990},
  doi = {10.1016/0166-5162(90)90054-3},
  url = {https://pubs.usgs.gov/publication/70015780},
  note = {Source identifier: 70015780}
}