@misc{indiciae48136f034054,
  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 = {1963},
  doi = {10.3133/b1142b},
  url = {https://pubs.usgs.gov/publication/b1142B},
  note = {Source identifier: b1142B}
}