@misc{indiciae6a7944244f7b,
  title = {Geologic map of the West Liberty quadrangle, Morgan County, Kentucky},
  author = {Kenneth John Englund and John Warfield Huddle and A. Otis Delaney},
  year = {1967},
  doi = {10.3133/gq589},
  url = {https://pubs.usgs.gov/publication/gq589},
  note = {Source identifier: gq589}
}