TY  - BOOK
AU  - Frenzel, Louis E
TI  - Communication electronics : principles and applications .-3rd ed .-0-07-048398-1
SN  - 0-07-048398-1
U1  - 621.38 Fre 
PY  - 2001///
CY  - Tata McGraw Hill, New Delhi
ER  -