000 00278nam a2200121Ia 4500
008 220201s1997 xx 000 0 eng d
082 _a4.6
_bSTA
100 _aStallings
245 0 _aData and computer communication
260 _aPHI
_bPHI
_c1997
300 _a798
942 _2ddc
999 _c35173
_d35173