| 000 | 003640000a22001330004500 | ||
|---|---|---|---|
| 001 | EST | ||
| 003 | 621.395.65 / S32 / PCM T.S. | ||
| 004 | M | ||
| 006 | m | ||
| 100 | _aSiemens | ||
| 245 | _aThe introduction of PCM transmission systems and their influence on telecommunication networks | ||
| 650 | _a<CONMUTACION TELEFONICA><TELECOMUNICACIONES> | ||
| 999 |
_c15611 _d15611 |
||