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ralph lauren polo

First Author:
Hassan Belkacem Ghassan
USMBA, Morocco and KFU, Saudi Arabia
5 street Imam chatibi la villette
Casablanca, Morocco

Second Author:

Mohammed Souissi
UM5, EMI, Rabat Agdal, Morocco
Rabat and fes, Morocco

Third Author:

Mohammed Kbiri Alaoui
Ministry of employment and UM5, EMI, Rabat, Morocco
Rabat, Morocco