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"HIET." Fullformexpand.com, https://www.fullformexpand.com/hiet/218548. Accessed 1 Dec. 2025.
Fullformexpand.com, 2025. "HIET." Accessed December 1, 2025. https://www.fullformexpand.com/hiet/218548.
"HIET." (n.d.). Fullformexpand.com. Retrieved December 1, 2025, from https://www.fullformexpand.com/hiet/218548.
HIET. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/hiet/218548 (Accessed: 1 December 2025).