@misc{indiciae47dcc06dcf94,
  title = {Geologic map of Henry Knob, York County, South Carolina},
  author = {D.B. Potter},
  year = {1953},
  doi = {10.3133/ofr53220},
  url = {https://pubs.usgs.gov/publication/ofr53220},
  note = {Source identifier: ofr53220}
}