| 000 | 003370000a22001330004500 | ||
|---|---|---|---|
| 008 | 140223b1951 xxu||||| |||| 00| 0 eng d | ||
| 041 | _aENG | ||
| 080 | _aC6:45 J1 | ||
| 082 | _aC6:45 J1 | ||
| 100 | _aSOMMER (A.) | ||
| 245 | _aPhotoelectric tubes. Edn.2. rev.and reset. | ||
| 260 |
_alondon _bMethuen _c1951 |
||
| 650 | _aELECTRICITY | ||
| 999 |
_c226595 _d226595 |
||