@misc{indiciaecebbefb3e69a,
  title = {Geologic names of Ordovician rock-stratigraphic units exposed in Kentucky},
  author = {Gordon Whitney Weir and Earle Rupert Cressman},
  year = {1978},
  doi = {10.3133/ofr78796},
  url = {https://pubs.usgs.gov/publication/ofr78796},
  note = {Source identifier: ofr78796}
}