000 00299nam a2200121Ia 4500
008 230303s9999 xx 000 0 und d
041 _aeng
082 _a004.6 GUP
100 _aGupta ( Prakash.C)
245 _aData Communications and Computer Networks
260 _aNew DelhI
_bPHI
365 _cRS
999 _c184895
_d184895