فهرس المقالات "value chain" حرية الوصول المقاله صفحة الملخص نص كامل 1 - Effect of the Olive Value Chain on the Assets of Olive Orchard Owners in Rudbar County: the Application of Sustainable Livelihood Approach Shahaboldin Shokri Yazdan Habibi Seyyed Mehdi Mirdamadi