Front:
OFFICIAL FIRST DAY COVER
25 YEARS
OF TRANSISTORS
WALTER BRATTAIN, WILLIAM SHOCKLEY AND JOHN BARDEEN, AWARDED
NOBEL PRIZE FOR TRANSISTOR INVENTION AT BELL LABORATORIES
Progress in Electronics
Art Craft
J.S. Lindsey
SERIES OF 1973
4314 nelam Dr. Peoria, Ill
Transistors
TOR
Progress in Electronics
1973-0
15
KG
80000
St
Progress in Electronics
Transistors
10000
Progress in Electronics
ССССССССССС
FIRST DAY OF ISSUE
MYS
2000000
Progress in Electronics
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الا الله