Pages 41-53
Yasser Rifat Tawfic; Abdel-Nasser A.Soltan; Amr B. Saddek
Pages 65-81
Nasr Tawfik Hassan Hekal; Reda Mohammed Ali Hassn
Pages 93-99
Alaa-Eldin Mohamed Abd-Elaal; Adel A. Mahmoud; Hassan Ibrahim Mohamed