Bui , D. D., Trinh , V. G., Tibor , K., Tran , N. T., Le , D. C., Tran , K. M., Nguyen , . H. Q. and Nguyen , V. K. (2013) “Parallel radon and thoron measurements in mineral sand mining area of Ha Tinh province”, Nuclear Science and Technology, 3(4), pp. 49-55. doi: 10.53747/nst.v3i4.327.