@misc{indiciaebc3100eb0110,
  title = {Carbon and sulfur relationships in Devonian shales from the Appalachian Basin as an indicator of environment of deposition},
  author = {Joel S. Leventhal},
  year = {1987},
  doi = {10.2475/ajs.287.1.33},
  url = {https://pubs.usgs.gov/publication/70014252},
  note = {Source identifier: 70014252}
}