AMER JABER, dr.; ZAHAWY, S. Measuring and Analysis of Productivity Efficiency by Using Cobb – Douglas Production Function in the State Company for Drug Industries in Samarras during (1986 – 2006). TANMIYAT AL-RAFIDAIN, [S. l.], v. 33, n. 103, p. 26–45, 2011. DOI: 10.33899/tanra.2011.161941. Disponível em: https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29604. Acesso em: 8 sep. 2025.