Anh Le, Hoang, 		Viet Thanh, Do, AND 		Duy Linh, Bui.
" Assessment of Natural Radioactivity Levels and Estimation  of Radiation Dose by Inhalation Environmental  Air Samples from Hanoi" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 37 Number 4 (4 December 2021)