TY  - BOOK
AU  - FRENZEL 
TI  - Principles of electronic communication systems 
SN  - 0028004094 
U1  - 621.382 FRE 1998 
PY  - 1998///
CY  - New York
PB  - McGraw Hill
KW  - Telecommunication
N1  - Includes index
ER  -