000 00239nam a2200109Ia 4500
020 _a8185336334
082 _a004.6
100 _aJREER, JHON
245 _aCOMPUTER COMMUNICATION AND NETWORKS
260 _aNEW DELHI
_b EWP
_c1990
942 _cBK
999 _c3987
_d3987