الغيلي رياض يحيى حسين; الأغبري صفوان عبدالوارث. The applicability of Sigma Six pharmaceutical factories in the Republic of Yemen. Journal of Social Studies, [S. l.], v. 21, n. 3, p. 201–242, 2015. DOI: 10.20428/jss.v21i3.907. Disponível em: https://journals.ust.edu/index.php/JSS/article/view/907. Acesso em: 19 dec. 2024.