Alikhan, Hussein Abdulmuttaleb, Ayad Kadhim Hussein, and Asmaa Sahib Alshukri. 2020. “Groundwater Quality Assessment Using Water Quality Index: A Case Study of Al Najaf City, Iraq”. Periodicals of Engineering and Natural Sciences 8 (3): 1482-90. https://doi.org/10.21533/pen.v8.i3.1188.