THERAJA B.L, TEHRAJA A.K, . (2003). A TEXTBOOK OF ELECTRICAL TECHNOLOGY V-II. NEW DELHI: S.CHAND AND COMPANY PVT.LTD.
THERAJA B.L, TEHRAJA A.K, . 2003. A TEXTBOOK OF ELECTRICAL TECHNOLOGY V-II. NEW DELHI: S.CHAND AND COMPANY PVT.LTD.
THERAJA B.L, TEHRAJA A.K, . A TEXTBOOK OF ELECTRICAL TECHNOLOGY V-II. NEW DELHI: S.CHAND AND COMPANY PVT.LTD. 2003.