@misc{indiciaef97b152ab34b,
  title = {St. Louis Area Earthquake Hazards Mapping Project},
  author = {Robert A. Williams and Phyllis Steckel and Eugene Schweig},
  year = {2007},
  doi = {10.3133/fs20073073},
  url = {https://pubs.usgs.gov/publication/fs20073073},
  note = {Source identifier: fs20073073}
}