TY  - BOOK
AU  - Couch, Leon W. 
TI  - Digital and analog communication systems 
SN  - 0023252812 
U1  - 621.382 COU 1993 
PY  - 1993///
CY  - New York
PB  - Macmillan
KW  - Digital communications
KW  - Telecommunication systems
N1  - Includes index
ER  -