SUJIMAN, Sujiman. 2023. “Trends in Ambient Air Quality (NO2 and SO2) in Tenggarong City, Kutai Kartanegara District. East Kalimantan”. International Journal of Environmental, Sustainability, and Social Science 4 (5):1497-1504. https://doi.org/10.38142/ijesss.v4i5.854.