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• Rajaei.Yadollah Estimated production function and productivity of the olive production in zanjan (tarom city case study) [ Vol.4, Issue 13 - Summer Year 1393]
• Rajaei.Yadollah Investigating the Comparative Advantage of Raisin in Province Zanjan and Determining Domestic Market Structure for it [ Vol.4, Issue 14 - Autumn Year 1393]