Muhi Al-Deen , Ra’ad. “The Oral Mucosa Alteration Associated With the Use of Khat Leaves Chewing by the People in Yemen”. Mustansiria Dental Journal 1, no. 2 (December 15, 2004): 153–156. Accessed July 3, 2024. https://mdj.uomustansiriyah.edu.iq/index.php/mdj/article/view/1109.