@misc{indiciaecbcbdcdd2065,
  title = {Geologic map of the Laurel quadrangle, Ohio-Kentucky},
  author = {Joseph James Kohut and Malcolm P. Weiss and Stanley J. Luft},
  year = {1973},
  doi = {10.3133/gq1075},
  url = {https://pubs.usgs.gov/publication/gq1075},
  note = {Source identifier: gq1075}
}