TY  - BOOK
AU  - Couch ,W.Leon
TI  - Digital and analog communication systems
SN  - 978-81-203-3411-3
AV  - SBL TK 5101  C68 2007
PY  - 2007///
CY  - Prentice Hall of India. Private Limited
PB  - New delhi
KW  -  Tel communication systems
ER  -