Assessing the actual situation of the breaststroke swimming subject learning results of National Defense and Security Education students at the Army Officer College No.1. jstsc [Internet]. 2019 Dec. 12 [cited 2024 Oct. 16];1(Đặc biệt):175. Available from: http://tckhupes1.edu.vn/index.php/upes1/article/view/1756