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Fullformexpand.com, 2026. "OBDU." Accessed January 1, 2026. https://www.fullformexpand.com/obdu/442590.
"OBDU." (n.d.). Fullformexpand.com. Retrieved January 1, 2026, from https://www.fullformexpand.com/obdu/442590.
OBDU. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/obdu/442590 (Accessed: 1 January 2026).