@misc{indiciae9ecef2e6450e,
  title = {Geologic map of the Richmond South quadrangle, Madison County, Kentucky},
  author = {Robert C. Greene},
  year = {1966},
  doi = {10.3133/gq479},
  url = {https://pubs.usgs.gov/publication/gq479},
  note = {Source identifier: gq479}
}