@misc{indiciae9632bf6682cf,
  title = {Improving the Homeland Security Advisory System: An experimental analysis of threat communication for homeland security},
  author = {Philip T. Ganderton and R. L. Bernknopf},
  year = {2007},
  url = {https://pubs.usgs.gov/publication/70180923},
  note = {Source identifier: 70180923}
}