Singh S., . (2004). Advanced Practical Physics Vol.2. Meerut: Pragati Pakashan;Meerut.
Singh S.P, . 2004. Advanced Practical Physics Vol.2. Meerut: Pragati Pakashan;Meerut.
Singh S.P, . Advanced Practical Physics Vol.2. Meerut: Pragati Pakashan;Meerut. 2004.