000 00334nam a2200133Ia 4500
008 241226s9999 xx 000 0 und d
020 _a0
082 _a651.7
_bGUP
100 _aGupta N K
245 0 _aBusiness of the telecommunications
260 _aNew Delhi :
_bTata Macgrow Hill,
_c2021.
350 _a450
650 _aManagement
999 _c165445
_d165445