Duong, Nguyen, Nguyen Anh Nguyet, Nguyen Van Huong, Jan Schimmelamann, Nguyen Dinh Thai, & Arndt Schimmelmann. " Radon Concentrations and their Controlling Factors in Mud-built Houses in Dong Van Plateau Karst Geopark, Ha Giang Province." VNU Journal of Science: Earth and Environmental Sciences [Online], 36.1 (2020): n. pag. Web. 23 Nov. 2024