Pages 1038-1046
michael fayez yousef; ashraf said Sayed-ahmed; ayman abd el-salam hassan; Yasser mohamed Nasr
Pages 1060-1067
Wafaa Ibrahim Abd elwahed; Adel Rizk; Yasser Nasr
Pages 1485-1493
Tarek El Sayed Hassan; Adel Rizk Botros; Yasser Mohamed Nasr