TY  - BOOK
AU  - Puri S K
TI  - Science and Technology
U1  - 507.6 P94S 
PY  - 2004///
CY  - New Delhi
PB  - jiwan Publishing House
KW  - SCIENCE - EXAMINATIONS, QUESTIONS etc
KW  - SCIENCE - EXAMINATIONS, QUESTIONS ETC
KW  - TECHNOLOGY - EXAMINATIONS,QUESTIONS ETC
ER  -