Radeva, Silviya. “RESEARCH OF THE AMBIENT AIR POLLUTION IN THE INDUSTRIAL REGION DEVNYA, BULGARIA: RESEARCH OF THE AMBIENT AIR POLLUTION IN THE INDUSTRIAL REGION DEVNYA, BULGARIA”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 9, no. 1 (March 17, 2023): 40–52. Accessed November 7, 2024. https://jsar.ftn.shu.bg/index.php/jsar/article/view/191.