@misc{indiciaee35b30223951,
  title = {Geology and oil and gas possibilities of upper Mississippian rocks of southwestern Virginia, southern West Virginia and eastern Kentucky},
  author = {Ralph H. Wilpolt and Douglas W. Marden},
  year = {1959},
  doi = {10.3133/b1072k},
  url = {https://pubs.usgs.gov/publication/b1072K},
  note = {Source identifier: b1072K}
}