000 00241nam a2200109Ia 4500
008 220201s1993 xx 000 0 eng d
100 _aBLACK, U.
245 0 _aCOMPUTER NETWORKS
260 _aDELHI
_bPHI
_c1993
300 _a436
942 _2ddc
999 _c67624
_d67624