TY  - BOOK
AU  - Haykin 
TI  - An introduction to analog and digital communications 
SN  - 0471617164 
U1  - 821.38 HAY 1989 
PY  - 1989///
CY  - New York
PB  - John Wiley & Sons
KW  - Telecommunication system
N1  - Includes index
ER  -