@misc{indiciae2da0fd546208,
  title = {Geology of the Ewing quadrangle, Kentucky and Virginia},
  author = {Kenneth John Englund and H.L. Smith and Larry D. Harris and J.G. Stephens},
  year = {1961},
  doi = {10.3133/gq172},
  url = {https://pubs.usgs.gov/publication/gq172},
  note = {Source identifier: gq172}
}