@misc{indiciae804073204829,
  title = {Upper Ordovician and Silurian stratigraphy in Sequatchie Valley and parts of the adjacent valley and ridge, Tennessee},
  author = {Robert C. Milici and Helmuth Wedow},
  year = {1977},
  doi = {10.3133/pp996},
  url = {https://pubs.usgs.gov/publication/pp996},
  note = {Source identifier: pp996}
}