@misc{indiciae3ec1a4160e8a,
  title = {Late Paleozoic depositional trends in the central Appalachian Basin},
  author = {Kenneth J. Englund and Roger E. Thomas},
  year = {1990},
  doi = {10.3133/b1839f},
  url = {https://pubs.usgs.gov/publication/b1839F},
  note = {Source identifier: b1839F}
}