000 00254nam a2200109Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aCHOUDHURY (D ROY)
245 0 _aNETWORK & SYSTEMS
250 _a2ND
260 _bNEW AGE INTERNATIONAL
942 _2ddc
999 _c98248
_d98248