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"DHEB." Fullformexpand.com, https://www.fullformexpand.com/dheb/diesel-hybrid-electric-bus. Accessed 7 May. 2026.
Fullformexpand.com, 2026. "DHEB." Accessed May 7, 2026. https://www.fullformexpand.com/dheb/diesel-hybrid-electric-bus.
"DHEB." (n.d.). Fullformexpand.com. Retrieved May 7, 2026, from https://www.fullformexpand.com/dheb/diesel-hybrid-electric-bus.
DHEB. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/dheb/diesel-hybrid-electric-bus (Accessed: 7 May 2026).