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Mohammed A. Al Madani, Yousef A. Abdullah, Elfitouri K. Ahmied, Noura S. Hawashi and Mahmoud J. Altayeb 2022. Investigation of Wadi Al-Shatti Iron Oxide Effects on the Gamma Ray Attenuation and Compression Strength of Hardened Concrete. Journal of Pure & Applied Sciences . 21, 4 (Oct. 2022), 213–218. DOI:https://doi.org/10.51984/jopas.v21i4.2213.