Farhan, Mohammed Noori. “Estimation of the Production Function of Diyala State Company for Electrical Industries for the Period 2010-2019”. International Academic Journal of Social Sciences 9, no. 1 (April 7, 2022): 1–8. Accessed October 28, 2026. https://iaiest.com/iaj/index.php/IAJSS/article/view/IAJSS0901.