000 00331nam a22001457a 4500
999 _c8668
_d8668
003 OSt
005 20210922164923.0
008 210922b xxu||||| |||| 00| 0 eng d
020 _aR0023
100 _aNavneet Gupta
245 _aOptical Communication
260 _aDhanpat Rai & Co
_bDelhi
_c2009
300 _a288
942 _2ddc
_cRF