00234nam a2200109Ia 4500008004100000041000800041082002700049100001200076245001900088260000900107300000800116211209s1967    xx            000 0 und d  aeng  a621.381 52 N67 LEE/BEL  aLEE M A  aTUNNEL DIODES   c1967  a196