Sagrera, J. L. “Qualitative Determination of the Constituents of Hydraulic Cements by X Ray Fluorescence”. Materiales de Construcción 18, no. 129 (March 31, 1968): 29–35. Accessed April 29, 2024. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1638.