“The Effect of y-Al,0, Substitution on the Crystallinity of Synthesized Tobermorite from Ultrafine Geothermal Silica ” (2024) Asia Pacific Journal of Social Innovation, 15(1), pp. 77–88. Available at: https://journals.msuiit.edu.ph/tmf/article/view/261 (Accessed: 17 May 2026).