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Han, Beom-Soon, Kyeongjoo Park, Kyung-Hwan Kwak, Seung-Bu Park, Han-Gyul Jin, Sungju Moon, Jong-Won Kim, och Jong-Jin Baik. "Air Quality Change in Seoul, South Korea Under COVID-19 Social Distancing: Focusing On PM(2.5)." Int J Environ Res Public Health 2020.

Han, Beom-Soon, et al. "Air Quality Change in Seoul, South Korea Under COVID-19 Social Distancing: Focusing On PM(2.5)." Int J Environ Res Public Health 2020.