@misc{indiciaecb2b20eb94f9,
  title = {Stratigraphic framework and distribution of lignite on Crowleys Ridge, Arkansas},
  author = {Charles R. Meissner},
  year = {1983},
  doi = {10.3133/ofr83609},
  url = {https://pubs.usgs.gov/publication/ofr83609},
  note = {Source identifier: ofr83609}
}