00289nam a2200109Ia 4500008004100000041000800041082002100049100002000070245004100090260004000131300000800171211209s1990    xx            000 0 und d  aeng  a621.3822 N90 KAM  aKAMEN, EDWARD W  aINTRODUCTION TO SIGNALS AND SYSTEMS   aNEW YORKbMACMILLAN PUBS. CO.c1990  a706