000 00322nam a2200121Ia 4500
008 250409s9999 xx 000 0 und d
020 _a81-203-2846-9
082 _a4.6
_bGUP
100 _aGupta, Prakash C
245 0 _aData communication and computer networkPHI2006
260 _aVidhyanagar
_bPHI
_c2007
365 _a225/-
999 _c253838
_d253838