00265nam a2200109Ia 4500008004100000041000800041082001500049100003200064245003300096260001900129365000700148230303s9999    xx            000 0 und d  aeng  a621.31 NAG  aNAGRATH (IJ) KOTHARI (D.P.)  aModern Power System Analysis  aNew DelhibTMH  cRS