25 Years of Transistors--Progress in Electronics

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 SERIES OF 1973 Art Craft YORK JUL 10 1973 NY Transistors 100 Progress in Electronics FIRST DAY OF ISSUE Judson Sindsey 4314 N. Nelson the Peoria, Ill.