000 00278nam a2200121Ia 4500
008 220201s1998 xx 000 0 eng d
082 _a621.382
_bSCH
100 _aSchweber
245 0 _aData communication
260 _aDelhi
_bMcgraw Hill
_c1998
300 _a557
942 _2ddc
999 _c35485
_d35485