Niu J, Wang Q, Guo Q, Li Y, Li F. Spatial Distribution of Heavy Metals in the Farmland at the Confluence of Songhua and Heilong Rivers, China. ajc [Internet]. 2013 Apr. 9 [cited 2024 Jul. 23];25(9):4897-901. Available from: https://asianpubs.org/index.php/ajchem/article/view/25_9_44