TY  - BOOK
AU  - Heiserman,David L.
AU  - Frenzel,Louis E.
TI  - Laboratory manual: Principles of electronic communication systems 
SN  - 0078281334
U1  - 621.382 21
PY  - 2004///
CY  - New York
PB  - McGraw-Hill
KW  - Telecommunication
ER  -