Minimum quantity for "Seismic Vulnerability and Impact of Disruption of Lifelines in the Conterminous United States" is 1.
Minimum quantity for "Earthquake-Resilient Lifelines: NEHRP Research, Development and Implementation Roadmap" is 1.
Minimum quantity for "A Model Methodology for Assessment of Seismic Vulnerability and Impact of Disruption of Water Supply Systems" is 1.