The effect of different sources of ordinary Portland cement on some properties of concrete mixes. Taj Al-Ma’rifa Journal , [S. l.], v. 4, n. 02, p. 149–163, 2026. DOI: 10.64943/jkc.2026.040210. Disponível em: https://histt.edu.ly/ojs/index.php/tajournal/article/view/176. Acesso em: 31 jul. 2026.