Al-Zahrani, J. and El-Taher, A. (2017) “Natural Radioactivity levels and Elemental Analysis of Cement by Gamma-Ray Spectrometer and Neutron Activation Analysis”, American Scientific Research Journal for Engineering, Technology, and Sciences, 30(1), pp. 173–183. Available at: https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/2807 (Accessed: 5 May 2024).