S. Muhammad, Bakhtiar, Kochar M. Abdullah, and Israa M. Ali. “Estimation of the Production Function of Making Bricks and Their Efficiency for the Period 2014-2018”. TANMIYAT AL-RAFIDAIN 42, no. 139 (September 1, 2023): 132–151. Accessed September 7, 2025. https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29505.