@misc{indiciae29a636976977,
  title = {St. Louis Area Earthquake Hazards Mapping Project - A PowerPoint presentation},
  author = {Robert A. Williams},
  year = {2009},
  doi = {10.3133/ofr20091198},
  url = {https://pubs.usgs.gov/publication/ofr20091198},
  note = {Source identifier: ofr20091198}
}