@misc{indiciae1e6efc37f7e6,
  title = {Stratigraphic framework of Cambrian and Ordovician rocks in the Appalachian Basin from Sequatchie County, Tennessee through eastern Kentucky, to Mingo County, West Virginia},
  author = {Robert T. Ryder and Robert D. Crangle and John E. Repetski and Anita G. Harris},
  year = {2008},
  doi = {10.3133/sim2994},
  url = {https://pubs.usgs.gov/publication/sim2994},
  note = {Source identifier: sim2994}
}