Abdulmutalib Raafat Sarhat, Muhammad Mohsin and Aram Hassan Mohammed 2022. Investigation of Groundwater Quality for Drinking Usage in Kifri District (Iraq) by using NPI and WQI Indices: Investigation of groundwater quality for drinking usage in Kifri District. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences. 59, 4 (Dec. 2022), 67–77. DOI:https://doi.org/10.53560/PPASA(59-4)802.