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| 082 | _a621.382 LIN | ||
| 100 | _aLinfield ,Robert F | ||
| 245 | 0 | _aTelecommunication present status and futur trernds | |
| 260 |
_aJaico publishing house _b2005 |
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| 650 | _aTELECOMMUNICATION | ||
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