TY  - BOOK
AU  - Opperheim, Alan V.
AU  - Willsky Alan S.
TI  - Signals and systems
SN  - 978-81-7758-262-8
U1  - 621.3822 
PY  - 1997///
CY  - New Delhi
PB  - Pearson Prentice Hall
KW  - Signals and systems
N1  - Includes appendix; Includes index
ER  -