| 000 | 00348 a2200097 4500 | ||
|---|---|---|---|
| 020 | _a926100881X | ||
| 920 | _a92-61-00881-X | ||
| 245 | 0 |
_aCCITT GAS 6 Economic and Technical Aspects of the Choice of Telephone Switching Systems / _c. |
|
| 710 | 2 |
_aInternational Telecommunication Union. _eWydawca _4pbl |
|
| 260 |
_aGeneva : _bITU, _c1981. |
||
| 300 |
_aXI, 351 s.: _bil.; _c30 cm. |
||
| 999 |
_c1827 _d1827 |
||