@misc{indiciae1fa71f414242,
  title = {Availability of low-sulfur coal in Clay County, West Virginia},
  author = {Donald G. Hadley},
  year = {1972},
  doi = {10.3133/ofr72147},
  url = {https://pubs.usgs.gov/publication/ofr72147},
  note = {Source identifier: ofr72147}
}