Bui , Dac Dung, Van Giap Trinh, Kovacs Tibor, Ngoc Toan Tran, Dinh Cuong Le, Khanh Minh Tran, Huu Quyet Nguyen, and Van Khanh Nguyen. 2013. “Parallel Radon and Thoron Measurements in Mineral Sand Mining Area of Ha Tinh Province”. Nuclear Science and Technology 3 (4):49-55. https://doi.org/10.53747/nst.v3i4.327.