Mohsen Hamad S. Comparing The Content Of The Iraqi Mathematics Book With The Saudi Mathematics Book For The Third Intermediate Grade And The Availability Of 21St Century Skills In The Iraqi Book. Opción [Internet]. 19 de octubre de 2019 [citado 8 de junio de 2025];350:504-32. Disponible en: https://mail.produccioncientificaluz.org/index.php/opcion/article/view/32177