@misc{indiciae21973d3a0ad0,
  title = {Geologic map of the Anchorage quadrangle, Jefferson and Oldham Counties, Kentucky},
  author = {Roy Clark Kepferle and Perry B. Wigley and Bernard Ray Hawke},
  year = {1971},
  doi = {10.3133/gq906},
  url = {https://pubs.usgs.gov/publication/gq906},
  note = {Source identifier: gq906}
}