The Prevalence of Vitamin D Deficiency: A Comparison Study in Two Libyan Cities Exemplified by Tarhuna and Tripoli. مجلة روافد المعرفة, [S. l.], v. 4, n. 8, p. 146–152, 2023. Disponível em: https://ra.azu.edu.ly/index.php/rawafed-almarefa/article/view/79. Acesso em: 23 يونيو. 2026.