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"GMASA." (n.d.). Fullformexpand.com. Retrieved February 23, 2026, from https://www.fullformexpand.com/gmasa/gunners-mate-armorer-seaman-apprentice.
GMASA. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/gmasa/gunners-mate-armorer-seaman-apprentice (Accessed: 23 February 2026).