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"OBK." Fullformexpand.com, https://www.fullformexpand.com/obk/442653. Accessed 26 Nov. 2025.
Fullformexpand.com, 2025. "OBK." Accessed November 26, 2025. https://www.fullformexpand.com/obk/442653.
"OBK." (n.d.). Fullformexpand.com. Retrieved November 26, 2025, from https://www.fullformexpand.com/obk/442653.
OBK. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/obk/442653 (Accessed: 26 November 2025).