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| 005 | 20250425161714.0 | ||
| 008 | 250425s9999 xx 000 0 und d | ||
| 041 | _aspa | ||
| 082 | _a621.3841 | ||
| 100 | _aWATSON, HERBERT M | ||
| 245 | 0 | _aUNDERSTANDING RADIO; A GUIDE TO PRACTICAL OPERATION AND THEORY | |
| 250 | _aS.E. | ||
| 260 | _aS.L. | ||
| 260 |
_aSin Pais _bMCGH _c1950 |
||
| 700 | _aEBY, GEORGE S | ||
| 700 | _aWELCH, HERBERT E | ||
| 942 | _c01 | ||
| 010 | _a26274 | ||
| 999 |
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