@misc{indiciae39a008db90ea,
  title = {Characteristics of giant rockslides in the Appalachian Valley and Ridge, Virginia, West Virginia, Maryland, and Pennsylvania},
  author = {C.S. Southworth and A. P. Schultz},
  year = {1986},
  doi = {10.3133/ofr8694},
  url = {https://pubs.usgs.gov/publication/ofr8694},
  note = {Source identifier: ofr8694}
}