00254nam a2200109Ia 4500008004100000041000800041082001800049100001500067245004500082260000900127300000800136211209s1977    xx            000 0 und d  aeng  a621.3 N77 ROB  aROBERT L S  aELECTRICAL FUNDAMENTALS FOR TECHNICIANS   c1977  a465