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| 020 | _a9788120307131 | ||
| 040 | _c0 | ||
| 041 | _aEnglish | ||
| 082 | _a621.381537 VIS;7 | ||
| 100 | _aViswanathan, Thiagarajan. | ||
| 245 | 0 | _aTelecommunication switching systems and networks | |
| 260 |
_c2002 _bPHI _aNew Delhi |
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