| 000 | 00424 a2200157 04500 | ||
|---|---|---|---|
| 001 | 2207 | ||
| 008 | 050609s1987 0 d | ||
| 045 | _a1987 | ||
| 082 | 0 |
_a621.38042 _bD571d |
|
| 245 | 0 |
_aDigital telecommunication: _bPart 1. Basic Information. |
|
| 260 | 4 |
_aGermany.: _bSIEMENS., _c1987 |
|
| 300 | 4 | _a60. p. | |
| 650 | _acomunicaciones digitales | ||
| 942 |
_2ddc _cBK |
||
| 999 |
_c2630 _d2630 |
||