Valleys leading into the city of Sajer in the Riyadh region. The International Journal for Scientific Research, [S. l.], v. 5, n. 5, 2026. DOI: 10.59992/IJSR.2026.v5n5p28. Disponível em: https://vsrp.co.uk/index.php/ijsr/article/view/1561. Acesso em: 22 jul. 2026.