@misc{indiciae58f2c221425e,
  title = {Lignite and the Midway-Wilcox stratigraphic boundary, Alabama and Mississippi},
  author = {C. R. Meissner and S. E. Heermann},
  year = {1982},
  doi = {10.3133/ofr82673},
  url = {https://pubs.usgs.gov/publication/ofr82673},
  note = {Source identifier: ofr82673}
}