Theraja B. T., . (2000). Text book of Electrical Technology Vol-I. : S.Chand.
Theraja B.L Theraja,A.K, . 2000. Text book of Electrical Technology Vol-I. : S.Chand.
Theraja B.L Theraja,A.K, . Text book of Electrical Technology Vol-I. : S.Chand. 2000.