00315nam 2200923 4500001000400000003002300004005000900027008004100036082001100077100002900088260002500117250001900142245002200161923StarLibrary Marc Built20180713201711 ||||| |||||||||||amh  a537.49 aalan oppenheim and other bprentice-hall c1997 aالطبعة 2 asignals & systems