TY  - BOOK
AU  - Nagrath, I.J Saran, S.N. Etal. 
TI  - Signals and systems 
SN  - 0-07-463771-5 
U1  - 621.382 2 NAG  
PY  - 2007///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - SIGNAL PROCESSING
ER  -