Đinh MQ, Nguyen TKH, Tran TT, Le MTT, Truong YL, Nguyen HDT. Some difficulties in teaching practical experimental biological knowledge in Natural Science subjects for grade 7 in some lower secondary schools in the Mekong Delta. Tạp chí Khoa học Đại học Đồng Tháp [Internet]. 2025 Feb. 12 [cited 2026 May 16];14(1):37-46. Available from: https://dthujs.vn/index.php/dthujs/article/view/1748