TY  - BOOK
AU  - R C Gupta and P N Saxena 
AU  - Gupta, R C    Saxena, P N 
TI  - Viva-voce in Advanced physics Vol.iind 
U1  - 537.5, GUP  
PY  - 1985///
CY  - Meerut
PB  - Pragati prakashan
ER  -