alemad, fateh addin najm addin. “EXPOSURE TO SECOND-HAND SMOKE AMONG ADOLESCENT IN SECONDARY SCHOOL STUDENTS IN SANA’A, YEMEN”. International Journal of Public Health Research 7, no. 1 (April 4, 2017): 783–790. Accessed May 3, 2024. https://spaj.ukm.my/ijphr/index.php/ijphr/article/view/36.