A. Elzain, Abd-Elmoniem, Adam K. Sarn, Othman M. Mukhtar, & Mustafa A. Abbasher.
" Measurements of Radon gas Concentration in a Soil at Some Towns in Kassala State." <em>Gezira Journal of Engineering and Applied Sciences</em> [Online], 4.1 (2009): 15 - 42. Web.  3 Jun. 2026