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020 _a08769247810
_c69
040 _aMAIN
041 _aEnglish
082 _a621.382
_bGOW
100 _aGowar, John
245 _aOptical communication systems
260 _aNew Delhi
_bPrentice Hall
_c1987
300 _axiv,577p.
650 _aCommunication engineering
650 _aEngineering
650 _aOptical communication
942 _cBK
999 _c35346
_d35346