Theraja B. T. E., . (2004). Text Book of Electrical Technology Vol,II. : S.Chand.
Theraja B.L Theraja,A.K Ed, . 2004. Text Book of Electrical Technology Vol,II. : S.Chand.
Theraja B.L Theraja,A.K Ed, . Text Book of Electrical Technology Vol,II. : S.Chand. 2004.