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"NADAG." (n.d.). Fullformexpand.com. Retrieved April 26, 2026, from https://www.fullformexpand.com/nadag/north-american-database-of-archaeological-geophysics.
NADAG. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/nadag/north-american-database-of-archaeological-geophysics (Accessed: 26 April 2026).