@misc{indiciaef27d4b82533a,
  title = {Manganese, iron, and barite deposits of the James River-Roanoke River district, Virginia},
  author = {Gilbert H. Espenshade},
  year = {1952},
  doi = {10.3133/mf5},
  url = {https://pubs.usgs.gov/publication/mf5},
  note = {Source identifier: mf5}
}