| 000 | 00522nam a2200193 a 4500 | ||
|---|---|---|---|
| 005 | 20231020063937.0 | ||
| 008 | 020506s1990 ea r 000 0 eng d | ||
| 020 | _a0809475782 | ||
| 035 | _aUPN01000117186 | ||
| 049 | _aCG | ||
| 050 | 4 |
_aTK5101 _bC6.4 |
|
| 245 | 0 | 0 | _aCommunications. |
| 260 |
_aAlexandria, Va. : _bTime-Life, _c1990. |
||
| 300 |
_a128 p. : _bil. col. |
||
| 440 | 0 | _aUnderstanding computers | |
| 650 | 4 |
_aTelecomunicaciones _94204 |
|
| 650 | 4 |
_aSISTEMAS DE TRANSMISION DE DATOS _915326 |
|
| 905 | _aLibro | ||
| 999 |
_c89743 _d89743 |
||