00277nam a2200109Ia 4500008004100000041000800041082002100049100001400070245002800084260004700112300000800159211209s1968    xx            000 0 und d  aeng  a621.3191 N67 KHE  aKHERA L K  aELECTRIC POWER SYSTEMS   aNEW DELHIbRAINHAND BOOK AND COMPANYc1968  a368