000 00250nam a2200097Ia 4500
008 230508s1980 xx 000 0 und d
041 _aeng
100 _aG J MARSHALL.
245 _aPRINCIPLES OF DIGITAL COMMUNI-
260 _bMCGRAW HILL.PUBLI CO
_c1980
999 _c733190
_d733190