000 00252nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aGUPTA (NAVNEET)
245 0 _aOPTICAL COMMUNICATION
250 _a2007
260 _bDHANPAT RAI
942 _2ddc
_cBTECH
999 _c5486
_d5486