@misc{indiciae99666a49db82,
  title = {Lithostratigraphy and depositional environments of the Lexington Limestone (Ordovician) of central Kentucky},
  author = {Earle Rupert Cressman},
  year = {1973},
  doi = {10.3133/pp768},
  url = {https://pubs.usgs.gov/publication/pp768},
  note = {Source identifier: pp768}
}