slide 29, 30 - stamped date JUN81N11 slide 25 & 26 (box ABS-011)
slide 15, 17, 19 - stamped date JUN81N6
slide 12 - stamped date JUN81N6
slide 10, 8 - stamped date JUN81N6
slide 5 - stamped date JUN81N6
slide 35 - stamped date JUN81N6
slide 31 - stamped date JUN81N6 slide 37 (box ABS-011)
slide 24, 25, 28, 34, 30, 32 - stamped date JUN81N6
slide 16 - stamped date JUN81N6