Erhenhi OH, Omoigberale OM. USING WATER QUALITY INDEX AND PRINCIPAL COMPONENT ANALYSIS FOR THE ASSESSMENT OF WATER QUALITY OF THE ETHIOPE RIVER, DELTA STATE, NIGERIA. NJSE [Internet]. 2022 Jun. 23 [cited 2024 Apr. 25];18(1). Available from: https://delsunjse.com/index.php/njse/article/view/60