@misc{indiciaefc9cde9a2f5c,
  title = {Geochemical results of 1979 coal drilling in the Warrior coal field, Tuscaloosa, Fayette, Walker, and Marion counties, Alabama},
  author = {Sharon Rose O’Donnell and Catherine A. Horsey},
  year = {1981},
  doi = {10.3133/ofr81617},
  url = {https://pubs.usgs.gov/publication/ofr81617},
  note = {Source identifier: ofr81617}
}