@misc{indiciaea7f95b4443bc,
  title = {Bituminous coal production in the Appalachian Basin: Past, present, and future},
  author = {R. C. Milici},
  year = {1999},
  doi = {10.3133/mf2330},
  url = {https://pubs.usgs.gov/publication/mf2330},
  note = {Source identifier: mf2330}
}