@misc{indiciaeb548300c5f1f,
  title = {Geologic map of part of the Owen quadrangle, Oldham County, Kentucky},
  author = {Warren Lee Peterson and Perry B. Wigley},
  year = {1971},
  doi = {10.3133/gq904},
  url = {https://pubs.usgs.gov/publication/gq904},
  note = {Source identifier: gq904}
}