Nga DV, Trang PTK, Duyen VT, Mai TT, Lan VTM, Viet PH, Postma D, Jakobsen R. Spatial variations of arsenic in groundwater from a transect in the Northwestern Hanoi. Vietnam J. Earth Sci. [Internet]. 2018 Mar. 15 [cited 2024 Apr. 28];40(1):70-7. Available from: https://vjs.ac.vn/index.php/jse/article/view/10971