TY  - BOOK
AU  - RAY Ajoy Kumar
AU  -  ACHARYA Tinku
TI  - Information technology:  Principles and applications   
SN  - 9788120321847
U1  - D6,9(B), P4 
PY  - 2004///
CY  -  New Delhi 
PB  - PHI Learning        
ER  -