“AIR QUALITY IN YOGYAKARTA CITY BASED ON AIR QUALITY MONITORING SYSTEM IN 2019-2020”, MSJ, vol. 8, no. 01, pp. 10–22, Jun. 2022, Accessed: Oct. 17, 2026. [Online]. Available: https://jurnal.polibara.ac.id/index.php/ojsdata/article/view/67