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Fullformexpand.com, 2025. "CHK." Accessed December 1, 2025. https://www.fullformexpand.com/chk/538813.
"CHK." (n.d.). Fullformexpand.com. Retrieved December 1, 2025, from https://www.fullformexpand.com/chk/538813.
CHK. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/chk/538813 (Accessed: 1 December 2025).