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By: Yordanova, Veronika - Todorova, Yovana - Belouhova, Mihaela - Kenderov, Lyubomir - Lyubomirova, Valentina - Topalova, YanaType: ArticleIn: BioRiskVolume: 17Series:Issue:Date: 2022Page Range: 59--71Publication Info: Pensoft Publishers 2022Subjects: ecological status Iskar River microbial community Pollution self-purification treated water discharge WWTP