000 00326nam a22001337a 4500
003 OSt
008 201231b ||||| |||| 00| 0 eng d
082 _a004.678
_bABB/D COMP
100 _aAbbas.TP
245 _aData communication & optical fibres
260 _aFeroke
_bCalicut university
_c2020
300 _a262p
942 _cTB
999 _c14313
_d14313