@misc{indiciae9555c9491494,
  title = {Geologic map of the Irvine quadrangle, Estill County, Kentucky},
  author = {Harry P. Hoge and Perry Braswell Wigley and Fred R. Shawe},
  year = {1976},
  doi = {10.3133/gq1285},
  url = {https://pubs.usgs.gov/publication/gq1285},
  note = {Source identifier: gq1285}
}