@misc{indiciae26407446933f,
  title = {Economics of the coal industry east of the Mississippi, 1973-1982},
  author = {S.B. Bhagwat},
  year = {1987},
  doi = {10.1016/0166-5162(87)90073-5},
  url = {https://pubs.usgs.gov/publication/70014218},
  note = {Source identifier: 70014218}
}