00283nam a2200109Ia 4500008004100000041000800041082002500049100002200074245002500096260004400121300000800165211209s1990    xx            000 0 und d  aeng  a621.3822 N90 OPP/WIL  aOPPENHEIM, ALAN V  aSIGNALS AND SYSTEMS   aNEW DELHIbPRENTICE-HALL OF INDIAc1990  a796