Merkliste 
 1 Ergebnisse 
 
1

Pollution of Varna Lake and possibilities of using the poll..:

Ganchev Todor ; Markova Valentina ; Valcheva-Georgieva Ivalena.
https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/41/e3sconf_eepes2023_03002.pdf.  , 2023