@misc{indiciae9ff94188feea,
  title = {Upper Ordovician formations in the Maysville area, Kentucky},
  author = {John H. Peck},
  year = {1966},
  doi = {10.3133/b1244b},
  url = {https://pubs.usgs.gov/publication/b1244B},
  note = {Source identifier: b1244B}
}