000 00268nam a22001217a 4500
999 _c6356
_d6356
003 OSt
005 20210320130820.0
008 210320b ||||| |||| 00| 0 eng d
100 _aKEISER, GERD
245 _aOPTICAL FIBER COMMUNICATION
260 _bTMH
942 _2ddc
_cGE