@misc{indiciae5c0d88fce5ea,
  title = {Eocene bituminous coal deposits of the Claiborne group, Webb County, Texas},
  author = {Robert W. Hook and Peter D. Warwick},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70192698},
  note = {Source identifier: 70192698}
}