@misc{indiciae08ab04beb5cc,
  title = {Geologic map of the Milton Quadrangle, Virginia-North Carolina and adjacent areas of Virginia},
  author = {O. T. Tobisch},
  year = {1972},
  doi = {10.3133/i683},
  url = {https://pubs.usgs.gov/publication/i683},
  note = {Source identifier: i683}
}