علي صالح أ. sources of Job Stress According to the point of view of secondary and preparatory school Headmasters in Nineveh governorate center. College of Basic Education Research Journal, [S. l.], v. 9, n. 1, p. 1–20, 2010. DOI: 10.33899/berj.2010.Vol9.Iss1.38766. Disponível em: https://berj.uomosul.edu.iq/index.php/berj/article/view/38766. Acesso em: 3 nov. 2025.