TY  - BOOK
AU  - Oppenheim, Alan, V Willsky, Alan, S 
TI  - Signals and systems 
SN  - 81-203-1246-5 
U1  - 621.382 2 OPP  
PY  - 2007///
CY  - Pearson education of asia 
PB  - New Delhi 
KW  - SIGNAL PROCESSING
ER  -