TY  - BOOK
AU  - Carlson,bruce A.
TI  - Communication systems: an introduction to signals and noise in electrical communication 
SN  - 007009960x
U1  - 621.382 22
PY  - 1986///
CY  - New Delhi
PB  - McGraw-hill book company
KW  - Computer networks
N1  - Includes bibliography and index
ER  -