@misc{indiciae49bde069e65c,
  title = {Denudation and erosion in the southern Appalachian region and the Monongahela Basin},
  author = {L. C. Glenn},
  year = {1911},
  doi = {10.3133/pp72},
  url = {https://pubs.usgs.gov/publication/pp72},
  note = {Source identifier: pp72}
}