Mahmood, M. A. . and Jbara, O. K. . (2016) “FUNCTION ESTIMTING THE COSTS IN DIYALA PROVINCE ”, Diyala Agricultural Sciences Journal , 8(1), pp. 134–147. Available at: https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/1416 (Accessed: 26 April 2024).