@misc{indiciaef317d3a80681,
  title = {Mississippian rocks of the northern part of the Black Warrior Basin, Alabama and Mississippi},
  author = {Stewart W. Welch},
  year = {1959},
  doi = {10.3133/oc62},
  url = {https://pubs.usgs.gov/publication/oc62},
  note = {Source identifier: oc62}
}