@misc{indiciaefd54c136f733,
  title = {Geologic map of the coastal plain part of the Joplin Quadrangle, Stafford and Prince William counties, Virginia},
  author = {R. B. Mixon},
  year = {1990},
  doi = {10.3133/ofr90550},
  url = {https://pubs.usgs.gov/publication/ofr90550},
  note = {Source identifier: ofr90550}
}