00382nam a2200133Ia 4500008004100000041001200041082002200053100002100075245004500096250001300141260002800154300001200182650005400194231217s9999    xx            000 0 und d  aEnglish  a621.380413  COU;4  aCouch II, Leon W 0aDigital and analog communication systems  a6th ed.   c2001bPearson Education  axxv+758  aDigital communication,Analog Analog communication