Twfiq, M. Z., F. M. Zarif, A. Massoud, and A. M. Al-Temamy. “Determination the Petrophysical and Natural Radioactivity Properties of Nubian Sandstone Aquifer at the Area of Northwest El Ain Village, Sharq El-Oweinat Area, Southwestern Desert, Egypt”. Asian Journal of Environment & Ecology, Vol. 15, no. 4, July 2021, pp. 37-55, doi:10.9734/ajee/2021/v15i430236.