slide 430 slide 441 with star
slide 9 - stamped date OCT77N4
no slide number - stamped date JUN69N18 duplicate
slide 158
slide 158 & L-79 - stamped date MAR70F1 duplicate slide 158 & 53-5 & 1117 - stamped dateJUN69F10
slide 32 - stamped date FEB78N13 slide 18 - stamped date FEB78N13