| 000 | 00308nam a22001097a 4500 | ||
|---|---|---|---|
| 082 | _a621.84 VAL'V | ||
| 100 |
_aVALVE AND ELECTRONIC CO _956900 |
||
| 245 | _aVALVE MANUAL PART-1 THERMIONIC VALVES CATHODE RAY TUBES PHOTOCELLS | ||
| 260 |
_aLONDON _bVALVE & ELECTRONIC CO _c1959 |
||
| 300 | _a223P | ||
| 942 | _cBK | ||
| 999 |
_c567224 _d567224 |
||