@misc{indiciae4ed7899efb45,
  title = {Geologic map of parts of the Greenup and Ironton quadrangles, Greenup and Boyd Counties, Kentucky},
  author = {Ernest Dobrovolny and John C. Ferm and S.O. Eroskay},
  year = {1966},
  doi = {10.3133/gq532},
  url = {https://pubs.usgs.gov/publication/gq532},
  note = {Source identifier: gq532}
}