000 00320nam a2200121Ia 4500
008 250409s9999 xx 000 0 und d
020 _a81-203-0984-7
082 _a621.382
_bROD
100 _aRoddy, D Coolen , John
245 0 _aElectronic communication 4th ed.
260 _aNew Delhi,
_bPHI ,
_c2004
365 _a350
999 _c253416
_d253416