TY  - BOOK
AU  - Carlson, A. Bruce; and Crilly, Paul B.
TI  - Communication  systems: an introduction to signals and noise in electrical communication 
SN  - 9780071321174
AV  - D3950 
U1  - 621.38223 22
PY  - 2011///
CY  - New Delhi
PB  - McGraw Hill Education
ER  -