@misc{indiciae0835030e9447,
  title = {Geologic map of the Cranston quadrangle, northeastern Kentucky},
  author = {John Calvin Philley and David Kent Hylbert and Harry P. Hoge},
  year = {1974},
  doi = {10.3133/gq1212},
  url = {https://pubs.usgs.gov/publication/gq1212},
  note = {Source identifier: gq1212}
}