B, Minjmaa, and Oyunchimeg T. “Sources of Heavy Metal Contamination in Landfill Soil Covers of Ulaanbaatar”. Mongolian Journal of Agricultural Sciences 22, no. 03 (May 9, 2018): 140–144. Accessed October 27, 2025. https://test.mongoliajol.info/MJAS/article/view/966.