Maria Temelkova. "INFLUENCE OF DANUBE AND TOPOLOVETS RIVERS ON THE WATER SOURCE OF THE TOWN OF VIDIN." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Water Resources. Forest, Marine and Ocean Ecosystems (2020): 209-216. https://doi.org/10.5593/sgem2020/3.1/s12.028