@misc{indiciaefb4e87bda1d5,
  title = {Disturbed zones: Indicators of deep-seated subsurface faults in the Valley and Ridge and Appalachian structural front of Pennsylvania},
  author = {Howard A. Pohn and Terri L. Purdy},
  year = {1982},
  doi = {10.3133/ofr82967},
  url = {https://pubs.usgs.gov/publication/ofr82967},
  note = {Source identifier: ofr82967}
}