@misc{indiciae73ad62361e56,
  title = {The Fall Line, a geologic, topographic, and economic boundary},
  author = {Raymond O. Plebuch},
  year = {1960},
  doi = {10.3133/ofr60112},
  url = {https://pubs.usgs.gov/publication/ofr60112},
  note = {Source identifier: ofr60112}
}