@misc{indiciae3ae103a15421,
  title = {Lithostratigraphy of the Silurian rocks exposed on the west side of the Cincinnati Arch in Kentucky},
  author = {Warren Lee Peterson},
  year = {1981},
  doi = {10.3133/pp1151c},
  url = {https://pubs.usgs.gov/publication/pp1151C},
  note = {Source identifier: pp1151C}
}