@misc{indiciae009bcb392966,
  title = {Preliminary geology of the Richardsville and a portion of the Midland quadrangles, Fauquier, Culpeper, and Stafford Counties, Virginia},
  author = {Karen Wier},
  year = {1977},
  doi = {10.3133/ofr77699},
  url = {https://pubs.usgs.gov/publication/ofr77699},
  note = {Source identifier: ofr77699}
}