@misc{indiciae79c3bbd73b1e,
  title = {Relationships between geology and engineering characteristics of soils and weathered rocks of Fairfax County and vicinity, Virginia},
  author = {S. F. Obermeier and W. H. Langer},
  year = {1986},
  doi = {10.3133/pp1344},
  url = {https://pubs.usgs.gov/publication/pp1344},
  note = {Source identifier: pp1344}
}