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005 | 20190319083738.0 | ||
008 | 190319b xxu||||| |||| 00| 0 eng d | ||
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040 | _aMAIN | ||
041 | _aEnglish | ||
082 | _a621.38216/VIS/TEL | ||
100 | _aTHIAGARAJAN VISWANATHAN | ||
245 | _aTELECOMMUNICATION SWITCHING SYSTEMS AND NETWORKS | ||
250 | _a2ND | ||
260 | _bPHI LEARNING PRIVATE LIMITED | ||
300 | _a620P | ||
650 |
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942 | _cBK | ||
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