000 00230nam a2200097Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aHAYKIN(SIMON)
245 0 _aDIGITAL COMMUNICATION SYSTEM
260 _bWILEY
942 _2ddc
_cMTECH
999 _c2673
_d2673