AL-NUMA, A. The Effect of Some Economic Variables in the Agricultural Value Added: A Sample of Arab Countries for Period 1980 – 2002 (Egypt, Syria and Algeria). TANMIYAT AL-RAFIDAIN, [S. l.], v. 31, n. 96, p. 204–221, 2009. DOI: 10.33899/tanra.2009.161789. Disponível em: https://edusj.uomosul.edu.iq/index.php/tanmiyat/article/view/30023. Acesso em: 10 sep. 2025.