@misc{indiciaef7a4f51e5403,
  title = {Stratigraphic and interregional changes in Pennsylvanian coal-swamp vegetation: Environmental inferences},
  author = {T.L. Phillips and R.A. Peppers and William A. DiMichele},
  year = {1985},
  doi = {10.1016/0166-5162(85)90010-2},
  url = {https://pubs.usgs.gov/publication/70012906},
  note = {Source identifier: 70012906}
}