@misc{indiciaef7c2e98b49f2,
  title = {Preliminary surface materials map of Annandale Quadrangle, Virginia},
  author = {Lucy M. Force and A.J. Froelich},
  year = {1975},
  doi = {10.3133/ofr75255},
  url = {https://pubs.usgs.gov/publication/ofr75255},
  note = {Source identifier: ofr75255}
}