@misc{indiciae3da13985b833,
  title = {Mississippian rocks in Kentucky},
  author = {E.G. Sable and G. R. Dever},
  year = {1990},
  doi = {10.3133/pp1503},
  url = {https://pubs.usgs.gov/publication/pp1503},
  note = {Source identifier: pp1503}
}