Hosam Ahmed Mohamed Ismail El Sabbagh , <br/><br/>
Shgnalling system number seven in egypt /  
 نظام الاشارة رقم سبعة فى مصر  
By Hosam Ahmed Mohamed Ismail El Sabbagh ; Supervised. Prof.Dr. Magdy Fikry Mohamed , Dr. Amr Badawi Mahmoud , 
 - 151 Leaves :  illustrations ;  30 cm. +  
<br/><br/>Thesis (M.Sc.) -Cairo University, 1994 
<br/><br/>Bibliography: pages 149 : 151 
<br/><br/><label>Subjects--Index Terms: </label>Shgnalling system number seven in egypt