1. AMWA (Association of Metropolitan Water Agencies) 2001 Memorandum to utilities serving 100,000 customers or more
2. Feasibility of Biological Warfare Against Public Water Supplies;Berger;Jour. AWWA,1955
3. CDC (Centers for Disease Control and Prevention) 1999 Critical Biological Agents for Public Health Preparedness Worksheet
4. Cox , J. 1999 Vandals Pollute Grass Valley Water Supply: Two Teens Held The Sacramento Bee
5. Methodology for Improving the Security of the Water Infrastructure;Danneels,2000