@misc{indiciae9404e0b1436b,
  title = {Changing patterns of Pennsylvanian coal-swamp vegetation and implications of climatic control on coal occurrence},
  author = {T.L. Phillips and R.A. Peppers},
  year = {1984},
  doi = {10.1016/0166-5162(84)90019-3},
  url = {https://pubs.usgs.gov/publication/70013194},
  note = {Source identifier: 70013194}
}