| 000 | 00434 a2200097 4500 | ||
|---|---|---|---|
| 020 | _a9261031412 | ||
| 920 | _a92-61-03141-2 | ||
| 245 | 0 |
_aCCITT GAS 9 Handbook B : _bCase Study on the Economic and Technical Aspects of the Transition of a Mixed (Analogue/Digital) National Network Moving to a Digital National Network / _c. |
|
| 710 | 2 |
_aInternational Telecommunication Union. _eWydawca _4pbl |
|
| 260 |
_aGeneva : _bITU, _c1988. |
||
| 300 |
_a260 s.: _bil.; _c30 cm. |
||
| 999 |
_c1830 _d1830 |
||