1. P.L. (Public Law) 2002 Public Health Security and Bioterrorism Preparedness and Response Act of 2002
2. What's Next for Drinking Water Security?;Roberson;Jour. AWWA,2004
3. Roberson , J.A. Morley , K.M. 2005 Contamination Warning System for Water: An Approach for Providing Actionable Information to Decision Makers www.awwa.org/Advocacy/Contamination_Warning_Systems.pdf