@misc{indiciae223598c65377,
  title = {Stratigraphic framework of the Devonian black shales of the Appalachian Basin},
  author = {J.B. Roen and Wallace De Witt},
  year = {1984},
  doi = {10.3133/ofr84111},
  url = {https://pubs.usgs.gov/publication/ofr84111},
  note = {Source identifier: ofr84111}
}