00327nam 2200891 4500001000400000003002300004005000900027008004100036082001100077100002000088260003300108250001900141245003500160891StarLibrary Marc Built20180713201711 ||||| |||||||||||amh  a537.17 ajeffery beasley bpearson prentice hall c2005 aالطبعة 8 amodern electronic comunication