TY  - BOOK
AU  - Hilvert,John
AU  - Bruce,Linda
TI  - Communication technology
T2  - How does it work? 
SN  - 9780732997441
U1  - 621.383 
PY  - 2005///
CY  - South Yarra : 
PB  - MacMillan, 
KW  - Telecommunication
KW  - Information technology
ER  -