Taha Hummady, dr. “The Problems of the Primary Exports and Its Impact on Economic Growth in Selected Sample of Non-Petroleum Developing Countries in Period from 1985 to 2004”. TANMIYAT AL-RAFIDAIN 31, no. 96 (December 1, 2009): 68–93. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/tanmiyat/article/view/30022.