00285nam a2200109Ia 4500008004100000041000800041082002700049100000800076245007400084260000900158300000800167211209s1978    xx            000 0 und d  aeng  a621.381 548 02 N79 PTI  aPTI  aELECTRONIC TROUBLE SHOOTING : A SELF INSTRUCTIONAL PROGRAMMED MANUAL   c1978  a270