@misc{indiciae005641c025a9,
  title = {Sinkholes and karst-related features of the Shenandoah Valley in the Winchester 30' x 60' Quadrangle, Virginia and West Virginia},
  author = {R. C. Orndorff and K.E. Goggin},
  year = {1994},
  doi = {10.3133/mf2262},
  url = {https://pubs.usgs.gov/publication/mf2262},
  note = {Source identifier: mf2262}
}