Radeva S. RESEARCH OF THE AMBIENT AIR POLLUTION IN THE INDUSTRIAL REGION DEVNYA, BULGARIA: RESEARCH OF THE AMBIENT AIR POLLUTION IN THE INDUSTRIAL REGION DEVNYA, BULGARIA. JSAR [Internet]. 2023 Mar. 17 [cited 2024 Nov. 24];9(1):40-52. Available from: https://jsar.ftn.shu.bg/index.php/jsar/article/view/191