000 00266nam a2200109Ia 4500
008 190516s9999 xx 000 0 und d
100 _aSHARMA (SANJAY)
245 0 _aDATA COMMUNICATION NETWORKS
260 _c2008
_bND SK KATARIA& SONS
300 _a484
942 _cBK
999 _c17335
_d17335