|
First Author:
|
| |
| Kais Tissaoui |
| University of Hail,Saudi Arabia . The IFG & FSEGT, University of Tunis El Manar, Tunisia |
| kaistissaoui@yahoo.fr |
| |
|
|
| |
| |
| |
|
Second Author:
|
| Taha Zaghdoudi |
| University of Hail,Saudi Arabia. LAREQUAD & FSEGT, University of Tunis El Manar, Tunisia. |
| zedtaha@gmail.com |
| |
|
|
| |
| |
| |
|
|
Third Author:
|
| Khaled issa Alfreahat |
| University of Hail, Community College,Saudi Arabia. |
| khaled.alfreahat@gmail.com |
| |
|
| Hail, 2440, Saudi Arabia |
| |
| |
| |
|
|
