000 00287nam a2200133Ia 4500
008 230321s9999 xx 000 0 und d
082 _a004.65
_bHEL
100 _aHeld, Gilbert
245 0 _aUnderstanding data Comm.
250 _a
260 _bPHI
_c2004
300 _a485
942 _cBK
999 _c4862
_d4862