TY  - BOOK
AU  - R C Gupta and Pn Saxena 
AU  - Gupta, R C    Saxena, Pn 
TI  - Viva- Voce in advanced physics : vol.iind 
U1  - 530, GUP  
PY  - 1984///
CY  - Meerut
PB  - Pragati prakashan
ER  -