TY  - BOOK
AU  - Cannon, Don L
TI  - Understanding communications system
U1  - 001.64252 CAN 
PY  - 1984///
CY  - Dallas, Texas-US
PB  - Texas Instrument
KW  - COMUNICACION DE DATOS (HARDWARE, SOFTWARE)
KW  - COMUNICACION VIA SATELITE
KW  - FASCIMILES
KW  - RADIO
KW  - TELEFONO
KW  - TELEGRAFO
KW  - TELEVISION
ER  -