@misc{indiciaedcb10e89557e,
  title = {Geologic Map of the Shenandoah National Park Region, Virginia},
  author = {Scott Southworth and John N. Aleinikoff and Christopher M. Bailey and William C. Burton and E.A. Crider and Paul C. Hackley and Joseph P. Smoot and Richard P. Tollo},
  year = {2009},
  doi = {10.3133/ofr20091153},
  url = {https://pubs.usgs.gov/publication/ofr20091153},
  note = {Source identifier: ofr20091153}
}