@misc{indiciae71b4ce4e1596,
  title = {Availability of low-sulphur coal in Nicholas County, West Virginia},
  author = {Donald G. Hadley},
  year = {1972},
  doi = {10.3133/ofr72150},
  url = {https://pubs.usgs.gov/publication/ofr72150},
  note = {Source identifier: ofr72150}
}