@misc{indiciae6f5fcd39243e,
  title = {Manganese deposits of the Lyndhurst-Vesuvius district, Augusta and Rockbridge Counties, Virginia},
  author = {Maxwell McMichael Knechtel},
  year = {1943},
  doi = {10.3133/b940f},
  url = {https://pubs.usgs.gov/publication/b940F},
  note = {Source identifier: b940F}
}