| 000 | 003840000a22001330004500 | ||
|---|---|---|---|
| 001 | EST | ||
| 003 | 621.382 / P33 / 3 / 1970 | ||
| 004 | M | ||
| 006 | m | ||
| 245 | _aVálvulas electrónicas y semiconductores = Vacuum tube and semiconductor fundamentals | ||
| 021 | _aV.3 | ||
| 650 | _a<VALVULAS ELECTRONICAS><DISPOSITIVOS ELECTRONICOS><SEMICONDUCTORES><TRANSISTORES> | ||
| 999 |
_c5275 _d5275 |
||