@misc{indiciae918d26155fbf,
  title = {Resources of low-volatile bituminous coal and semianthracite in west-central Arkansas, 1978},
  author = {Boyd Raymond Haley},
  year = {1987},
  doi = {10.3133/b1632},
  url = {https://pubs.usgs.gov/publication/b1632},
  note = {Source identifier: b1632}
}