| 000 | 00405nam a2200157Ia 4500 | ||
|---|---|---|---|
| 999 |
_c9666 _d9666 |
||
| 001 | 00105 | ||
| 008 | 190706s9999 xx 000 0 und d | ||
| 020 |
_a719826611X _a719825717 |
||
| 082 | _a621.3852 B424 | ||
| 100 | _aBenry, Beker. | ||
| 100 | _aPiper, Fred. | ||
| 245 | 0 |
_aCircute Systems. _b The Protection of Communications |
|
| 260 |
_aLonden _bNorthwood _c1982 |
||
| 300 | _a24X16 427 | ||
| 942 | _cREF | ||