000 00251nam a2200109Ia 4500
008 220201s1997 xx 000 0 eng d
100 _aGUPTA, PRAKASH C.
245 0 _aDATA COMMUNICATIONS
260 _aDELHI
_bPHI
_c1997
300 _a475
942 _2ddc
999 _c67041
_d67041