@misc{indiciae8143fa2e34b5,
  title = {Structural and stratigraphic framework of the Giles County area, a part of the Appalachian Basin of Virginia and West Virginia},
  author = {Robert C. McDowell and Arthur P. Schultz},
  year = {1990},
  doi = {10.3133/b1839e},
  url = {https://pubs.usgs.gov/publication/b1839E},
  note = {Source identifier: b1839E}
}