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THERAJA B. &. T., . (2004). TEXT BOOK OF ELECTRICAL TECHNOLOGY. N.DELHI: .
THERAJA B.L & THERAJA,A.K, . 2004. TEXT BOOK OF ELECTRICAL TECHNOLOGY. N.DELHI: .
THERAJA B.L & THERAJA,A.K, . TEXT BOOK OF ELECTRICAL TECHNOLOGY. N.DELHI: . 2004.