000 00323nam a2200133Ia 4500
005 20260413101018.0
008 230516s9999||||xx |||||||||||||| ||und||
100 _aAgarwal DC
245 0 _aF bre Optic communication
260 _bN Delhi S chand & sons
_c2007
300 _a428
942 _cGB
999 _c6122
_d6122