Abdul Aziz Abul Karim, Dr., and Mohammed Hasan. “Measuring the Effect of Determinants of Extractive Industrial Output”. TANMIYAT AL-RAFIDAIN 29, no. 88 (December 1, 2007): 120–133. Accessed December 4, 2025. https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29762.