BS ISO 3639:1981(2000) Cinematography — Projection reels / spools 75 to 312 mm diameter for 8 mm Type S motion - picture film — Dimensions and specifications
1996BS ISO 3639:1996 Cinematography. Projection reels/spools 75 to 312 mm diameter for 8 mm Type S motion-picture film. Dimensions and specifications
1996BS ISO 3639:1981 Cinematography - Projection reels/spools 75 to 312 mm diameter for 8 mm Type S motion-picture film - Dimensions and specifications