@misc{indiciae5bdcc491a841,
  title = {Reconnaissance geologic map of the Yadkin Valley region, North Carolina},
  author = {G.H. Espenshade},
  year = {1967},
  doi = {10.3133/ofr6790},
  url = {https://pubs.usgs.gov/publication/ofr6790},
  note = {Source identifier: ofr6790}
}