000 00258nam a22001217a 4500
999 _c6432
_d6432
003 OSt
005 20210320213151.0
008 210320b ||||| |||| 00| 0 eng d
100 _aPROAKIS
245 _aDIGITAL COMMUNICATIONS
260 _bTMH
942 _2ddc
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