@misc{indiciae6a853b469a34,
  title = {Geologic map of the James River Face Wilderness, Bedford and Rockbridge counties Virginia},
  author = {C. Erwin Brown and E.W. Spencer},
  year = {1981},
  doi = {10.3133/mf1337a},
  url = {https://pubs.usgs.gov/publication/mf1337A},
  note = {Source identifier: mf1337A}
}