@misc{indiciaea7f4e9bb45a1,
  title = {Tectonostratigraphic terranes and their Paleozoic boundaries in the central and southern Appalachians},
  author = {J. Wright Horton, and A.A. Drake and D.W. Rankin},
  year = {1989},
  doi = {10.1130/spe230-p213},
  url = {https://pubs.usgs.gov/publication/70209310},
  note = {Source identifier: 70209310}
}