Sirirak, J, N Worawannotai, C Suwanchawalit, and S Chayabutra. “Preparation and Characterization of Lake Pigments from Sappan Wood Using Thai Local Clays”. Journal of Metals, Materials and Minerals 30, no. 1 (March 26, 2020). Accessed April 25, 2024. https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/560.