00349nam a2200133Ia 4500100002500000650002700025490000700052654004300059245004300102260003100145082001900176300000800195546001200203  aBird/J.O/ May/A.J.C   aElectrical Engineering  vII  aElectrical And  Electronics Principals  aElectrical And  Electronics Principals  bButtersworthaLondonc1981  a621.3bBir/May  a156  aENGLISH