Devi Oktaviana Latif, Ahmad Rifa’i, and Kabul Basah Suryolelono. 2019. “CHEMICAL CHARACTERISTICS OF VOLCANIC ASH IN INDONESIA FOR SOIL STABILIZATION: MORPHOLOGY AND MINERAL CONTENT”. GEOMATE Journal 11 (26):2606-10. https://geomatejournal.com/geomate/article/view/2646.