TY  - BOOK
AU  - Sehgal N K
AU  -  Chopra K L
AU  -  Sehgal D L
TI  - Modern physics:  Chopra K L  Sehgal D L   
SN  - 8180542610 (pbk)
U1  - C, P4   Carpa 
PY  - 2004///
CY  - New
PB  - Delhi Sultan Chand & Sons      
KW  -  Modern physics
KW  - Physics
ER  -