TY  - BOOK
AU  - Das, J Mullick, S.K and Chatterjee, P.K 
TI  - Principles of digital communications 
SN  - 0-85226-150-0 
U1  - 621.382 DAS  
PY  - 2001///
CY  - New age international 
PB  - Bangalore 
KW  - COMMUNICATION SYSTEM
ER  -