@misc{indiciae30c18768434c,
  title = {Appalachian coal assessment: Defining the coal systems of the Appalachian basin},
  author = {R. C. Milici},
  year = {2005},
  doi = {10.1130/0-8137-2387-6.9},
  url = {https://pubs.usgs.gov/publication/70035262},
  note = {Source identifier: 70035262}
}