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Instructional film research (rapid mass learning) 1918-1950.

APA Citation

United States. Office of Naval Research. (1951). Instructional film research (rapid mass learning) 1918-1950. Washington: GPO.

United States. Office of Naval Research. Instructional Film Research (rapid Mass Learning) 1918-1950. Washington: GPO, 1951.

Warning: These citations may not always be complete (especially for serials).