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"PHIGS." Fullformexpand.com, https://www.fullformexpand.com/phigs/916367. Accessed 30 Nov. 2025.
Fullformexpand.com, 2025. "PHIGS." Accessed November 30, 2025. https://www.fullformexpand.com/phigs/916367.
"PHIGS." (n.d.). Fullformexpand.com. Retrieved November 30, 2025, from https://www.fullformexpand.com/phigs/916367.
PHIGS. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/phigs/916367 (Accessed: 30 November 2025).