فرج عزيز د. The Effect of Using First Letter Technique on the Acquisition of Vocabulary by Fifth Class Primary Pupils in English Language. College of Basic Education Research Journal, [S. l.], v. 10, n. 2, p. 563–573, 2011. Disponível em: https://jeh.uomosul.edu.iq/index.php/berj/article/view/38392. Acesso em: 27 oct. 2025.