“An Investigation on the Radiation Hazards Associated with the Use of Abakaliki Pyroclastic from Southeastern Nigeria as Construction Materials” (2013) Global Journal of Science Frontier Research, 13(A2), pp. 17–22. Available at: https://www.journalofscience.org/index.php/GJSFR/article/view/746 (Accessed: 6 February 2026).