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دليل المستخدم
Bakri، M. S.، و Christiansen، J. E. (1991). EFFECT OF THE RELATIONSHIP BETWEEN AGRICULTURAL EXTENSION AGENTS AND WHEAT FARMERS IN MEDINA REGION, SAUDI ARABIA, ON THE ADOPTION OF APPROPRIATE WHEAT PRODUCTION PRACTICES (رسالة دكتوراه غير منشورة). Texas A and M University، كوليج ستيشن. مسترجع من http://search.mandumah.com/Record/617817
Bakri، Mohammed Saleh، و James E. Christiansen. "EFFECT OF THE RELATIONSHIP BETWEEN AGRICULTURAL EXTENSION AGENTS AND WHEAT FARMERS IN MEDINA REGION, SAUDI ARABIA, ON THE ADOPTION OF APPROPRIATE WHEAT PRODUCTION PRACTICES" رسالة دكتوراه. Texas A and M University، كوليج ستيشن، 1991. مسترجع من http://search.mandumah.com/Record/617817