Theraja B. T., . (2002). Text Book of Electrical Technology Vol-II. : S.Chand.
Theraja B.L Theraja,A.K, . 2002. Text Book of Electrical Technology Vol-II. : S.Chand.
Theraja B.L Theraja,A.K, . Text Book of Electrical Technology Vol-II. : S.Chand. 2002.