JELLUD IBRAHIM, W. English Language Materials for Postgraduate Students of Agriculture. اداب الرافدین, [S. l.], v. 32, n. 35, p. 51–68, 2002. DOI: 10.33899/radab.2002.166954. Disponível em: https://radab.uomosul.edu.iq/index.php/radab/article/view/33756. Acesso em: 13 dec. 2025.