Testimony submitted for the record to the House Homeland Security Committee, Subcommittee on Transportation Security and Infrastructure Protection on June 24, 2008.
Willis, Henry H., Challenges of Applying Risk Management to Terrorism Security Policy. Santa Monica, CA: RAND Corporation, 2008. https://www.rand.org/pubs/testimonies/CT310.html.
Willis, Henry H., Challenges of Applying Risk Management to Terrorism Security Policy, Santa Monica, Calif.: RAND Corporation, CT-310, 2008. As of June 15, 2021: https://www.rand.org/pubs/testimonies/CT310.html