@misc{indiciae071407010734,
  title = {Depletion of Appalachian coal reserves - how soon?},
  author = {R. C. Milici},
  year = {2000},
  doi = {10.1016/s0166-5162(00)00013-6},
  url = {https://pubs.usgs.gov/publication/70022445},
  note = {Source identifier: 70022445}
}