Gamal Enan, Gamal El-Didamony, El-Hellaly Mohamed and Azza Zakaria
Asian Journal of Applied Sciences 7 ( 2 ): 66 - 78 , 2014
Gamal Enan, Abdul-Raouf Al- Mohammadi, Gamal El- Didamony, Mahmoud E.F. Abdel- Haliem and Azza Zakaria
Asian Journal of Applied Sciences 7 ( 7 ): 621 - 634 , 2014