000 00353nam a2200133Ia 4500
999 _c23459
_d23459
008 190711s9999 xx 000 0 und d
020 _a0130920401
082 _a621.38415 B573
100 _aBeyda, William J.
245 0 _aBasic data communications: A comprehensive overview
260 _aCliffs
_bPrentice Hall
_c1989
300 _a24X18
942 _cBK