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دليل المستخدم
Abd Almawla، M. A. (2013). : Causality between Knowledge and Economic Growth: ( An Empirical Investigation for the Case of Sudan ( 1980 - 2008. مجلة ركائز معرفية، مج1, ع1 ، 1 - 21. مسترجع من http://search.mandumah.com/Record/604852
Abd Almawla، Mutasim Ahmed. ": Causality between Knowledge and Economic Growth: ( An Empirical Investigation for the Case of Sudan ( 1980 - 2008." مجلة ركائز معرفية مج1, ع1 (2013): 1 - 21. مسترجع من http://search.mandumah.com/Record/604852