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Narayana Rao B. V., . (1969). Engineering physics 3rd year 2nd sem. : Ambika bk.
Narayana Rao B V, . 1969. Engineering physics 3rd year 2nd sem. : Ambika bk.
Narayana Rao B V, . Engineering physics 3rd year 2nd sem. : Ambika bk. 1969.