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Fullformexpand.com, 2025. "BBTU." Accessed November 19, 2025. https://www.fullformexpand.com/bbtu/775697.
"BBTU." (n.d.). Fullformexpand.com. Retrieved November 19, 2025, from https://www.fullformexpand.com/bbtu/775697.
BBTU. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/bbtu/775697 (Accessed: 19 November 2025).