Ts, B., B, K., G, O., E, V. I., V, S. E., D, T. and T, K. A. (2018) “BACKGROUND CONCENTRATION OF MICROELEMENTS IN ULAANBAATAR REGIONAL NATURAL SURFACE SOIL”, Proceedings of the Mongolian Academy of Sciences, 58(2), pp. 15–24. doi: 10.5564/pmas.v58i2.1001.