1. Applied Technology Council 1991 ATC-25: Seismic vulnerability and impact distribution of lifelines in the conterminous United States Redwood City, Calif.
2. Barakat and Chamberlin, Inc. 1994 The value of water supply reliability: Results of a contingent valuation survey of residential customers Calif. Urban Water Agencies Sacramento, Calif.
3. Bay Area Economic Forum 2002 Hetch Hetchy water and the Bay Area economy San Francisco, Calif.
4. Bay Area Water Supply and Conservation Agency 2006 Annual survey, FY 2004-05
5. Bay Area Water Users Association 2000 Annual survey results, FY 1999-00 San Mateo, Calif.