000 00273nam a2200109Ia 4500
008 200226s9999 xx 000 0 und d
082 _aGUP-D
100 _aGUPTA,PRAKASH C.
245 0 _aDATA COMMUNICATION AND COMPUTER NETWORKS
260 _bPHI LEARNING
_c2014
942 _cBK
999 _c5718
_d5718