TY  - BOOK
AU  - Carlson, A. Bruce.
AU  -  Crilly, Paul B.
AU  - Rutledge, Janet C.
TI  - Communication systems: an introduction to signals and noise in electrical communication 
SN  - NA
AV  - 4308 
U1  - 621.38223 22
PY  - 2002///
CY  - Boston
PB  - McGraw-Hill
ER  -