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Sehgal D L, Chopra K L & Sehgal N K. (1982). Electricity and magnetsim. : .
Sehgal D L, Chopra K L and Sehgal N K. 1982. Electricity and magnetsim. : .
Sehgal D L, Chopra K L and Sehgal N K. (1982). Electricity and magnetsim. : .
Sehgal D L, Chopra K L and Sehgal N K. Electricity and magnetsim. : . 1982.