TY  - BOOK
AU  - Oppenheim, Alan V.
AU  - Willsky, Alans S.
AU  - Nawab, S. Hamid.
TI  - Signals and systems
SN  - 0136511759
AV  - D4014 
U1  - 621.3822320 22
PY  - 1997///
CY  - USA
PB  - Prentice hall
N1  - Includes bibliographical references and index
ER  -