000 00301nam a2200121Ia 4500
100 _aStallings, William
020 _a0-02-946172-3
942 _cBK
245 _aBusiness data communications
260 _aMacmillan Publishing Company, New York
_c1990
082 _a001.64404 Sta
300 _axviii,796
999 _c65792
_d65792