@misc{indiciaeeb1f4790492c,
  title = {Preliminary stratigraphic cross section showing radioactive zones in the Devonian Black Shales in southeastern Ohio and west-central West Virginia},
  author = {Laure G. Wallace and John B. Roen and Wallace De Witt},
  year = {1978},
  doi = {10.3133/oc83},
  url = {https://pubs.usgs.gov/publication/oc83},
  note = {Source identifier: oc83}
}