FERAHTIA, A. et al. 2021. SURFACE WATER QUALITY ASSESSMENT IN SEMI-ARID REGION (EL HODNA WATERSHED, ALGERIA) BASED ON WATER QUALITY INDEX (WQI). Studia Universitatis Babeș-Bolyai Chemia. 66, 1 (Mar. 2021), 127–142. DOI:https://doi.org/10.24193/subbchem.2021.1.10.