@misc{indiciaeed8f53c7f531,
  title = {Geologic map of the Supply quadrangle, Caroline and Essex Counties, Virginia},
  author = {R. E. Weems and David S. Powars and Robert B. Mixon},
  year = {1996},
  doi = {10.3133/gq1769},
  url = {https://pubs.usgs.gov/publication/gq1769},
  note = {Source identifier: gq1769}
}