“Assessment of Groundwater Quality Using the Weighted Arithmetic Method for the Water Quality Index (WAWQI) in the Districts of Shu’ub, Azal and Al-Safia - Sana’a”. Journal of the College of Basic Education 29, no. 121 (November 20, 2023): 235–213. Accessed July 9, 2025. https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/10831.