@misc{indiciae50a2a5a8e1b8,
  title = {Post-middle Miocene origin of modern landforms in the eastern Piedmont of Virginia},
  author = {Robert E. Weems and Lucy E. Edwards},
  year = {2007},
  url = {https://pubs.usgs.gov/publication/70031067},
  note = {Source identifier: 70031067}
}