Nguyen HTT, Le HTT, Ha LKT. Preserving the Mother Tongue of Ethnic Minority Students through Experiential Activities in Primary Schools: An Exploratory Study in the Northern Mountainous Region of Vietnam. IJLTER [Internet]. 2023 Aug. 30 [cited 2026 Apr. 19];22(8):272-86. Available from: https://ijlter.myres.net/index.php/ijlter/article/view/1718