000 00270nam a2200121Ia 4500
100 _aSchweber, William L
020 _a0-07-001097-8
942 _cBK
245 _aData communications
260 _aMcgraw-Hill, New York
_c1988
082 _a001.64 Sch
300 _axi,564
999 _c35375
_d35375