@misc{indiciae29e2cc8ca5d6,
  title = {Geologic map of the Pleasant Ridge quadrangle, Ohio and Daviess Counties, Kentucky},
  author = {Gus H. Goudarzi and Avery E. Smith},
  year = {1968},
  doi = {10.3133/gq766},
  url = {https://pubs.usgs.gov/publication/gq766},
  note = {Source identifier: gq766}
}