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Fullformexpand.com, 2026. "GKB." Accessed January 26, 2026. https://www.fullformexpand.com/gkb/839979.
"GKB." (n.d.). Fullformexpand.com. Retrieved January 26, 2026, from https://www.fullformexpand.com/gkb/839979.
GKB. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/gkb/839979 (Accessed: 26 January 2026).