@misc{indiciae53c078bc160f,
  title = {Determination of organic-matter content of Appalachian Devonian shales from gamma-ray logs},
  author = {James W. Schmoker},
  year = {1981},
  doi = {10.1306/03b5949a-16d1-11d7-8645000102c1865d},
  url = {https://pubs.usgs.gov/publication/70011969},
  note = {Source identifier: 70011969}
}