Maya Rankova, Plamen Angelov, Borislav Vuchko, Р. А. Иванова. DETERMINATION OF THE RESOURCES OF SURFACE WATER BODIES IN THE ISKAR RIVER CATCHMENT FOR THE PERIOD 1991-2020. 25th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2025, Water Resources, Forest, Marine, and Ocean Ecosystems, Vol25, Issue 3.1, 2025, pp. 99-106. https://doi.org/10.5593/sgem2025/3.1/s11.12