@misc{indiciae5967e85ce1fc,
  title = {The Giles County, Virginia, seismic zone},
  author = {G. A. Bollinger and R. L. Wheeler},
  year = {1983},
  doi = {10.1126/science.219.4588.1063},
  url = {https://pubs.usgs.gov/publication/70011236},
  note = {Source identifier: 70011236}
}