| 000 | 00414nam a22001697a 4500 | ||
|---|---|---|---|
| 003 | NUST - PNEC | ||
| 005 | 20170116180944.0 | ||
| 008 | 150907b xxu||||| |||| 00| 0 eng d | ||
| 020 | _a- | ||
| 040 | _cLIBRARY | ||
| 082 | _a621.384132 SPA | ||
| 100 |
_98883 _aSpangenberg, Karl R. |
||
| 245 |
_aVacuum tubes _cKarl R. Spangenberg |
||
| 260 | _cc.1948 | ||
| 650 |
_98887 _aVacuum-tubes _xMScom |
||
| 942 |
_2ddc _cBK |
||
| 999 |
_c66246 _d66246 |
||