Byambajav, G., Batbaatar, B., Ariunsaikhan, A. and Chonokhuu, S. 2021. Particulate matter concentrations during winter seasons of 2016-2020 in Ulaanbaatar, Mongolia. Proceedings of the Mongolian Academy of Sciences. 61, 01 (Mar. 2021), 30–39. DOI:https://doi.org/10.5564/pmas.v61i01.1559.