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| 001 | EST | ||
| 003 | ARTICULOS VARIOS / CARPETA Nº | ||
| 004 | 2 | ||
| 006 | m | ||
| 100 | _aHolzmann, Gerard J | ||
| 100 | _aPehrson, Bjor | ||
| 245 | _aThe first data network: the optical telegraph is almost forgotten. Two centuries ago it moved messages over hun dreds of kilometers in a few minute | ||
| 068 | _aEn: Scientific American, January 199 | ||
| 650 | _a<TELEGRAFIA><HISTORIA DE LA TELEGRAFIA><REDES | ||
| 999 |
_c20163 _d20163 |
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