NAGRATH I J & KOTHARI D P, . (1993). THEORY & PROBLEMS OF ELECTRIC MACHINES. : TATA MC GRAW HILL.
NAGRATH I J & KOTHARI D P, . 1993. THEORY & PROBLEMS OF ELECTRIC MACHINES. : TATA MC GRAW HILL.
NAGRATH I J & KOTHARI D P, . THEORY & PROBLEMS OF ELECTRIC MACHINES. : TATA MC GRAW HILL. 1993.