@misc{indiciae30d932be6b85,
  title = {Defining organic-rich facies in the Devonian shale in the western part of the Appalachian Basin},
  author = {James W. Schmoker},
  year = {1980},
  doi = {10.3133/ofr80707},
  url = {https://pubs.usgs.gov/publication/ofr80707},
  note = {Source identifier: ofr80707}
}