@misc{indiciae1f5c3c40fb8a,
  title = {Geomorphology of the Shenandoah Valley, Virginia and West Virginia, and origin of the residual ore deposits},
  author = {John Tilton Hack},
  year = {1965},
  doi = {10.3133/pp484},
  url = {https://pubs.usgs.gov/publication/pp484},
  note = {Source identifier: pp484}
}