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"DFON." Fullformexpand.com, https://www.fullformexpand.com/dfon/1071688. Accessed 24 Nov. 2025.
Fullformexpand.com, 2025. "DFON." Accessed November 24, 2025. https://www.fullformexpand.com/dfon/1071688.
"DFON." (n.d.). Fullformexpand.com. Retrieved November 24, 2025, from https://www.fullformexpand.com/dfon/1071688.
DFON. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/dfon/1071688 (Accessed: 24 November 2025).