@misc{indiciaebcf1e6cdf78f,
  title = {Eocene Yegua Formation (Claiborne group) and Jackson group lignite deposits of Texas},
  author = {Robert W. Hook and Peter D. Warwick and Sharon M. Swanson and Paul C. Hackley},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70192711},
  note = {Source identifier: 70192711}
}