000 00378nam a2200157Ia 4500
008 160615s9999 xx 000 0 und d
100 _aBARDEN(Robert) & HACKER(Michael)
245 _aCommunication technology.
260 _aU.S.A.
260 _bDelmar Publishers
260 _c1990
300 _axiv p. + 434p
942 _cBooks
999 _c18951
_d18951