A. Ghada Younis, H. Heba F, and S. Ammar S, “Assessment of Periodontal Pathogens and Gingival Health Improvement after School-based Educational Program among Secondary School Students”, HOM, vol. 9, no. 1, Feb. 2023, Accessed: Sep. 14, 2025. [Online]. Available: http://www.historymedjournal.com/index.php/medicine/article/view/580