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اسامة ابراهيم أبو الحسن احمد
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Issue Date
Title
Author(s)
2005
اثر تطبيق الادارة البيئية على وحدات الانتاج بقطاع البترول المصرى.....دراسة مقارنة
اسامة ابراهيم أبو الحسن احمد
