TY  - GEN
AU  - Ahmed,N.U.
AU  - Natarajan,T.
TI  - Discrete-time signals and systems 
SN  - 0835913759
U1  - 621.38223 
PY  - 1983///
CY  - Reston, Va.
PB  - Reston Pub. Co.
KW  - Discrete-time systems
ER  -