@misc{indiciae547e01d76f12,
  title = {Paleoclimatic controls on coal resources of the Pennsylvanian system of North America - introduction and overview of contributions},
  author = {T.L. Phillips and C. B. Cecil},
  year = {1985},
  doi = {10.1016/0166-5162(85)90008-4},
  url = {https://pubs.usgs.gov/publication/70012940},
  note = {Source identifier: 70012940}
}