00307nam 2200901 4500001000400000003002300004005000900027008004100036082001100077100001800088260002500106250001900131245002500150901StarLibrary Marc Built20180713201711 ||||| |||||||||||amh  a537.27 abruce carlson bmcgraw - hall c2002 aالطبعة 4 acommunication system