TY  - GEN
AU  - Oppenheim, Alan V.
AU  - Willsky, Alan S.
AU  - Nawab, S. Hamid
TI  - Signals & systems
SN  - 8120312465
U1  - 003.8 
PY  - 1997///
CY  - New Delhi
PB  - Prentice Hall
KW  - SYSTEMS DISTINGUISHED IN RELATION TO TIME
KW  - SYSTEMS
ER  -