@misc{indiciae3b62b4acd459,
  title = {Organic-matter content of Appalachian Devonian shales determined by use of wire-line logs: summary work done 1976-80},
  author = {J. W. Schmoker},
  year = {1981},
  doi = {10.3133/ofr81181},
  url = {https://pubs.usgs.gov/publication/ofr81181},
  note = {Source identifier: ofr81181}
}