| 000 | 00346nam a2200121Ia 4500 | ||
|---|---|---|---|
| 008 | 160523s9999 xx 000 0 und d | ||
| 020 | _a0-07-112662-7 | ||
| 100 | _aKessler, G. C. | ||
| 245 | _aISDN concepts, facilities, and services | ||
| 260 |
_aNew York _bMcGraw Hill _c1991 |
||
| 300 | _axvi, 302p. | ||
| 490 | _aMcGraw-Hill communications series | ||
| 999 |
_c24512 _d24512 |
||