000 00306nam a2200121Ia 4500
008 220201s1990 xx 000 0 eng d
082 _a4.6
_bFRE
100 _aFreer,John
245 0 _aComputer communication and networks
260 _adelhi
_bEast West Press pvt. ltd
_c1990
300 _a432
942 _2ddc
999 _c33322
_d33322