Tran KN. Improving junior high school students’ knowledge of physiological change of puberty and safe sex (A case study at Thong Linh Junior High School, Cao Lanh City, Dong Thap Province). Dong Thap University Journal of Science [Internet]. 2015 Apr. 15 [cited 2024 Sep. 8];(12):53-8. Available from: https://dthujs.vn/index.php/dthujs/article/view/1061