@misc{indiciaec219c960e59f,
  title = {Geologic map of the Williamstown quadrangle, Grant and Pendleton Counties, Kentucky},
  author = {Stanley J. Luft},
  year = {1973},
  doi = {10.3133/gq1104},
  url = {https://pubs.usgs.gov/publication/gq1104},
  note = {Source identifier: gq1104}
}