000 00299nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a621.3815 P832
100 _aPORAT.D.I
245 0 _aINTRODUCTION TO DIGITAL TECHNIQUES
260 _aNEW YORK
_bWiley
_c1987
300 _a24X20
942 _cBK
_2DDC
999 _c21980
_d21980