TY  - BOOK
AU  - Gupta, S., L. 
AU  - Gupta S. 
TI  - Concepts of Modern Physics : for b.sc., a.m.i.e. and engineering graduates 
PY  - 1989///
CY  - New Delhi 
PB  - Dhanpat Rai Publications Pvt. Ltd. 
KW  - Physics Concepts 
ER  -